PEERLESS MI SERIES, MIH SERIES, MI-03, MI-04, MI-05 Installation, Operation & Maintenance Manual

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MI/MIH

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CAST IRON BOILERS

MI Model Available for Natural or LP Gas

• Standit_g Pilot (3 9 sectior_) with 8(7_ AFUE

• [-Ioneywell SmartValve ® Intermittent Ignition (3-9 section)

with 82% AFUE

MIH Mid-E._f_ency Model Available in 3-6 Sections

for Natural Gas

• Honeywell SmartValve ®Intermittent Ignition with 83% AFUE

• Qualifies for Utility Company Energy Rebates in Some Areas

Natural Draft (Chimney) Venting Low Profile Design

• Internal Horizontal to Vertical Draft Diverter

• Ideal for Ir_stallations with Low Ceilings

Steel Push Nipples

• Provici( _ a Permar_ent _Vct_'r 7"(c)hl Seed Between Sections

• Unaffected by PetroIcum alzd Oilier Contaminants

Deluxe Insulated Enameled Steel Jacket

• Reduces Boiler Heat Loss

• Completely Encloses Gas Valve and Burners

Safety Controls

• Vent Safety ShutoffSwitch

• Flame Rollout Safety ShutoffSwitch

• Standing Pilot or Honeywell SmartValve _

Intermittent Ignition

• Honeywell Operating Controls

• Taco Circulator

• Elec. Operated Automatic Vent Damper

• Grundfos Circulator

• 50 PSI Safety Relief Valve

• Non-Combustible Floor Pan

c_xStltartVah;_t i._ r_ rt,gislt_rt,d Ircldt,illark o I llo¢letlw(tll Corporcltion.

l_crless q[f_,r on_ of tll_" mosl c:omprelt_.nsive wctrrarlly prof.jrarrus in tttt_ ind_Lslr_/. All I_ (_rlt'ss r_'sidt't_ticd c_¢_t iro,_ !_oil<.rs inc'!_d_, c_ lidl one tj_!(_r Illarl€_rlltj. A limited. ['_[_[_-r_kl_SS ®

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s I(_(__I_ I)oilt,rs. l'_t _(, tz!I(1 It"_I _1_"(_r_"xt_"r_(1<'(1tmt_rrczl iIi(".s (ati l X ii f_ (11id I_ll)ol ar(_ _to_v (_v(_ lied)& ". CAST IRON BOILERS

/'/(,cLs(_ co¢l._tdt ['(,('rli,ss [ ](,_ll(,_ (2)m[J(lll{/ ]OF Coltll)l(.lt, it)(iFK(llll!j it!]orlnaliorL

Peerless Heater Company * 231 North Walnut Street * Boyertown. PA 19512 1021 * 610 367 2153 * www,peerless-heater.eom

FAB MI l_l {3/02 5M)

Pnnled _n U S A

USING THIS MANUAL 1

A. INSTALLATION SEQUENCE ............. 1

B. SPECIAL ATTENTION BOXES ........... 1

1. PREINSTALLATION 2

A. ACCESSIBILITY CLEARANCES .......... 2

B. CLEARANCE FROM COMBUSTIBLE

CONSTRUCTION ..................... 2

C. AIR FOR COMBUSTION AND

VENTILATION ....................... 2

D. LIQUEFIED PETROLEUM (LP) GAS ....... 4

E. INSTALLATION SURVEY ............... 4

E PLANNING THE LAYOUT ............... 4

7. START-UP PROCEDURES 20

A. COMPLETING THE INSTALLATION ...... 20

B. CONTROL DESCRIPTIONS ............. 24

C. ADJUSTMENT OF GAS PRESSURE

REGULATOR ....................... 24

D. ADJUSTMENT OF PILOT GAS FLOW .... 24

E. CHECKING BURNER INPUT ............ 24

E CHECK-OUT PROCEDURE ............. 25

8. TROUBLESHOOTING 26

A. SHUT-DOWN CAUSED BY PILOT OUTAGE,

BLOCKED VENT SHUT-OFF SWITCH OR

FLAME ROLL-OUT SAFETY SHUT-OFF

SWITCH ........................... 26

B. TROUBLESHOOTING GUIDES .......... 26

A. BOILER SUPPLY AND RETURN .......... 6

B. SAFETY RELIEF VALVE ................ 7

C. PIPING FOR ZONED SYSTEMS .......... 8

D. EXPANSION TANK .................... 9

E. INDIRECT-FIRED WATER HEATER ........ 9

E FREEZE PROTECTION ................. 9

A. INTEGRAL DRAFT HOOD ............. !0

B. VENT DAMPER INSTALLATION -

GENERAL .......................... 10

C. VENT PIPING AND CHIMNEY .......... 11

D. BOILER REMOVAL FROM COMMON

VENTING SYSTEM ................... 12

A. GENERAL .......................... 29

B. DAILY (WITH BOILER IN USE) .......... 29

C. WEEKLY (WITH BOILER IN USE) ........ 29

D. MONTHLY (WITH BOILER IN USE) ....... 29

E. ANNUALLY (BEFORE START OF HEATING

SEASON) .......................... 30

10. BOILER DIMENSIONS _ _TINGS 31

A. BASE/COMBUSTIBLE FLOOR PAN ....... 32

B. MANIFOLD/GAS TRAIN ............... 34

C. BLOCK/DRAFT HOOD ................ 36

D. JACKET ........................... 38

E. CONTROLS/CIRCULATOR/VENT

DAMPER .......................... 40

A. WIRING ........................... 15

B. ZONED SYSTEM WIRING ............. 15

C. CONTROLS ........................ 15

D. SEQUENCE OF OPERATION ........... 16

Follow thetnsta[lattoninstructionspro',,'_dedill this

manual m the order shown The order ot these mstructLons has been set m order to provide the installer

with a logical sequence ol steps that wdl mulmllze

potenhal interferences and maximize safety, during

boiler mstallatLon

Indicates a condition or hazard which will cause severe personal injury, death or major property

damage.

Throughout thLs manual you will see speoal attenuon

boxes intended to supplement the mstmct=ons and make speoal nohce of potenhal hazards These categories mean m the judgment of Peerless Heater Company

indicates a condition or hazard which may cause

severe personal injury, death or major property damage.

Indmates a condition or hazard which will or can cause minor personal injury or property damage.

indicates special attention is needed, but not directly related to potential personal injury or property damage.

1.!B INS

Read carefully, study these msh-uchons before beginning work

This bo,le_ must be installed by a quahfled con_ac_or The bonler warranty can be voided _t the boder Is not installed, maintained and serviced correctly

The equipment must be installed m accordance with those installation requirements of the authority having jurisdiction or, in the absence of such requirements, to the current edition of the National Fuel Gas Code, ANSI

Z223.1/NFPA 54. Where requtred by the authority having jurisdiction, the installation must conform to American Society of

Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers, ASME CSD-I.

r_*wr:_o,[o.]:[.."[.."]I:]I ! / ik'd_a,]l :f;1 :_r_*l_[q _

Install boiler not less than 24" between the left slde. top, and tront ot the boiler and adjacent wall or other

apphance, when access is reqmred for servicing

The design of ths boiler _scertffled for alcove mstallatlon wlth the following clearances

I 6" between s,des and combustible construction

2 24" between top of jacket and combushble

construction

3 6" between draft hood and combustible

COl_ls_uctlon

4 6" between vent pipe and combustLble construction 5 10" between rear of ]acket and combushble

consiluctlon

Do not install this boiler on combusttble flooring

unless it is installed on a special combustible floor pan provided by Peerless Heater Company. Boiler

installation on combustible flooring without the special pan is a fire hazard.

To order combustible floor pan, use the 5-digit stock codes listed in Section 11A of this manual.

Do not install this boiler on carpeting. Boiler installation on carpeting asa fire hazard. Install this boder on non.combustible flooring or use a

combustible floor pan to install thts boder on other

non-carpeted flooring.

Prowde adequate facflltnes for combustlon and

vent]lahon a_r unaccordance w_th Sechon 5 3. ALrfor

Combustion and Ventilation Nanonal Fuel Gas

Code ANSI -7223 1/NFPA 54, or apphcable

prows_ons of the local budding code Subsechons 2

through 6 below are based on National Fuel Gas

Code ANSI Z223 1!NFPA 54 requnrements

DehnltlOnS

Unconfined Space: a space whose volume usnot

less than fifty (50) cubnc feet per 1000 Btu/hr of the

total input rahng of all apphances installed Jnthat

space Rooms commumeatmg dnrectly w_th the space

m which the apphances are installed, through

opemngs not furmshed w_th doors, are considered

part of the unconfined space

Unusually Tight Construction: Constmchon

where

Walls and cenlmgs exposed to the outsMe atmosphere have a continuous water vapor

retarder wlth a rating of i perm or less wLth openings gasketed or sealed, and

b Weatherstnppmg has been added on openable

windows and doors, and

CaulkLng or sealants are supphed to areas such as joints around window and door frames. between sole plates and floors, between wall- ceflmg joints, between wall panels, at penetratlons for plumbing, electrical and gas hnes, and at other openings

3 Appliances Located in Unconfined Spaces:

For installations in unconfined spaces with other than unusually tight construction, the supply of air for combustion and ventilation can usually be considered adequate.

4. Unusually Tight Construction:

For equipment located in buildings of unusually tight construction as defined on the previous page, provide air for combustion and ventilation using the

methods described in 5a or 5b below.

5. Appliances Located in Confined Spaces:

a. All air from inside the building: Provide two

permanent openings communicating directly with an additional room or rooms of sufficient volume

so that the combined volume of all spaces meets the criteria for an unconfined space. Use the total

input of all gas utilization equipment installed in

the combined space in making this determination.

Size each opening with a minimum free area of one square inch per 1000 Btu/hr. of the total

rating of all gas utilization equipment in the

confined space, but not less than I00 square inches. Begin with one opening 12 inches from

the top, and begin the other opening within 12 inches of the bottom of the enclosure. See Figure

1. Provide air openings with minimum dimensions not less than three (3) inches.

b. All air from outside the building. Connect the

confined space with the outdoors in accordance with methods i) or ii) below. Provide air openings

with minimum dimensions not less than three (3) inches. Where ducts are used, make certain that they are the same cross-sectional area as the free area of the openings to which they connect.

Provide two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches of the

bottom of the enclosure. Connect the

openings directly or by duets, with the outdoors or spaces (crawl or attic) that freely

communicate with the outdoors.

Where directly communicating with the

outdoors (see Figure 2) or where communicating to the outdoors through vertical ducts (see Figure 3), size each opening with a minimum free area of one (I) square inch per 4000 Btu/hr. of total rating of all equipment in the enclosure.

i ?

12" max

TWO AIR OPENINGS:

Minimum

Free Area Each -

1 in2per 1000 Btuh

at Least 100 in2

BUILDING

Must communicatefreely

withoutdoors

Must notbeunder

negativepressure

12" max

Figure 1: Air Openings - All Air from Indoors

TWO AIR OPENINGS:

Minimum

Free Area Each -

1 in_per 4000 Btuh

Figure 2: Air Openings - All Air Directly from

Outdoors

Figure 3: Air Openings - All Air from Outdoors

through Vertical Ducts

:_ IIL_l_uf±lUHff±_ugl[e]L_l[_'q_|J;kVJ_k

Where communicating with the outdoors

through horizontal ducts, size each opening

with a minimum free area of one (1) square

inch per 2000 Btu/hr of total input rating of

all equipment in the enclosure. See Figure 4.

ii) Where the equipment has clearances of at

least one (1) inch from the sides and back and six (6) inches from the front of the appliance, the code allows one permanent opening, commencing within 12 inches of the top of the enclosure. Connect the opening directly with the outdoors or through

a vertical or horizontal duct to the outdoors or spaces (crawl or attic) that freely

communicate with the outdoors. Size the opening with a minimum free area of one

square inch per 3000 Btu!hr. of the total input rating of all equipment in the enclosure,

and not less than the sum of the areas of all vent connectors in the confined space.

In calculating free area of an opening, take into account the blocking affect of louvers, grilles and

screens. Do not use screens smaller than i/4" mesh. If the free area is known, use this value in calculating

the size of the opening required. If it is not known, assume that wood louvers provide 20-25% free area,

and metal louvers and grilles provide 60-75% free area.

Remove sources of hydrocarbons (bleaches, cleaners, chemicals, sprays, paint removers, fabric

softeners, etc.) from the boiler area. The vapors generated by these substances can contaminate the combustion air and contribute to shortened

boiler/vent system life.

I_ff±!_l_ll_[dl|ll:lt_VLelll

Liquefied Petroleum (LP) is heavier than air and may

collect or "pool" in a low area in the event of a leak from defective equipment.This gas may then ignite,

resulting in a fire or explosion. See the instructions below.

ii-i ..

12"maxl [ i 1--

, _t [jT TWO AIR OPENINGS: |

) 1' Minimum l

Free Area Each =

in_per 2000 Btuh !

_ min

12"max

Figure 4: Air Openings - All Air from Outdoors

through Horizontal Ducts

For new and existing installations, a Water Installation Survey is available from Peerless Heater Company. The

survey will provide information on how a hot water boiler works with your specific system and will provide

an overview of hot water system operation in general.

You can also use this survey to locate system problems

which will have to be corrected. To obtain copies of the

Water Installation Survey, contact your Peerless

representative.

Prepare sketches and notes of the layout to minimize the possibility of interferences with new or existing equipment, piping, venting and wiring.

I IJ ! [o|lJ :l ;i I:ll]'.J :Eld:{o] ! ::[IILVA|_[€-r_,_..

The following LP requirements from the Uniform Mechanical Code, section 304.6, may be in effect in

your geographic area:

"Liquefied peh'oleum gas-burning appliances shall not be installed in a pit, basement or similar location

where heavier-than-air gas might collect. Appliances

so fueled shall not be installed in an above-grade under-floor space or basement unless such location

is provided with an approved means for removal of unburned gas."

l_.]llF'4T_'i:i_IrJ_

Provide a sound, level foundahon Locate boiler as near to the chmney or outside v_ali as possLble and

cennahzed v_Jth respect to the heahng system

Locate boiler [n front of installation pos[hon before _movll_g crate

If using combushble floor pan, poslhon pan on foundat,on or flooring

4 Separate the wood shppmg pallet from the boiler

base by removing two (2) hold-down bolts at each end of the boder base

5 Move boder into hnal poslhon If using combustLble

floor pan, install boder on pan as outhned ,n the instructions included wlth the pan

3. WATER PIPING AND CONTROLS

"-I [:{=]ll_;l[.-llJ'J_Jl_'m_,]l_ll] I;l:i[IJ;|k'

1. Size the supply and return to suit the system. A

t_pical piping arrangement is shown in Figure 5. Refer also to the I-B-R Installation Guide No. 200

and the Peerless Water Survey for additional guidance during water piping installation.

2. Return Piping: a. For boilers equipped with a factory mounted

circulator, pipe the return to the inlet connection of the circulator.

b. For boilers equipped with a separate, unmounted

circulator, pipe the outlet connection of the circulator to a tee, provided with a drain valve, at the 1-1/4 NPT return tapping near the bottom of the left section. Pipe the return to the inlet

connection of the circulator.

Supply Piping: Pipe the supply to the I i/2 NPT supply tapping at

the top and rear of the boiler.

When system return water temperature will be below

130°E pipe the boiler with a bypass arrangement to blend the system return and hot supply to obtain at least 130°F entering the boiler. For more information on bypass piping, consult the Peerless Water Survey.

If desired, install the circulator in the alternate location shown in Figure 5. Consult the Peerless Water Survey for more information on circulator

location.

COLD

WATER

FILL

VAL VE

DRAIN

VAI VE J

DRAIN

Figure 5: Supply and Return Piping

6. Install this boiler so that the gas ignition system components are protected from water (dripping, spraying, etc ) during appliance operation and service (circulator replacement, condensate trap, control replacements, etc )

7. If this boiler and distribution system is used in conjunction with a refrigeration system, pipe the chilled medium in parallel with the boiler and install the proper valve to prevent the chilled medium from

entering the boiler. A drawing illustrating this hook- up is provided in Figure 6

8. When the boiler is connected to heating coils located

in air handling units where they may be exposed to

refrigerated air circulation, install flow control valves

or other automatic means to prevent gravity

circulation of the boiler water during the cooling

cycle.

9. If this boiler is installed above radiation level,

provide a low water cutoff device, either as a part of

the boiler or at the time of boiler installation.

C HECj VAILVEI

SUPPLY

LINE

WATER THREE WAY

_HILLER VALVE

Figure 6: Parallel Hook-up with Water Chiller

I:m l-'f!1=:lL'dI;t=l!l=l:l krl±lLvd

i I Locate safety relief valve and fittings in bag

assembly.

2. If air elimination is not required at the safety relief valve tapping, install valve and piping as shown in Figure 7.

3. For air elimination at the safety relief valve tapping, install valve and piping as shown in Figure 8.

SAFETY RELIEF

VALVE

x6"

NIPPLE

Pipe the discharge of safety relief valve to prevent injury in the event of pressure relief, Pipe the discharge to a drain. Provide piping that is the same size as the safety relief valve outlet.

Figure 7: Safety Relief Valve Hook-Up Installation

with Air Elimination in System Piping

TO AIR

ELIMINATION

DE_CE

SUPPLY TEE

SAFETY X 6 _ RELIEF NIPPLE

VALVE

NIPPLE

TO DRAIN

5/4" STREET

ELBO_

Figure 8: Safety Relief Valve Hook-Up with

Air Elimination

loll I'JI_IL'_[_ l;:[e];l v_[o]L'ql:lm]F.._'_"-]Ii :hVj_

1. See Figures 9 and 10 for basic zoned system layouts.

2 Run each zone pipe down then up to zone to

prevent air accumulation in piping

3. If required, provide means to isolate and drain each zone separately,

TO SYSTEM

ZONE ZONE ZONE

5 2 /

ZONE

VALVES

SUPPLY

FROM SYSTEbl

BAL _,NCINO

VAi VES m',

CONNECT TO

RETURN

(CIRCULATOR INLET)

ZONE ZONE ZONE

I 2 3

Figure 9: Zone Piping with Zone Valves

TO SYSTEM

ZONE ZONE ZONE

5 2 1

FROM SYSTEM

ZONE ZONE

1 2 3

FLOW

CONTROL _]

VALVES

I-

CONNECT

SUPPLY

ZONE

CIRCULATORS

CONNECT TO

RETURN

TAPPING

Figure 10: Zone Piping with Circulators

I_ I:l;f:l:_,l: I;J;{e]i:_l,]i[o]_

1. Consult the tank manufacturer's instructions for

specific information relating to tank installation Size the expansion tank for the required system volume and capacity. See Table 8 in Section 10 for boiler water capacity.

Expansion tanks are available with built-in fill valves and check valves for reducing supply water pressure

and maintaining minimum system pressure. Check the design features of the tank and provide valves as

necessary.

Refer back to Figure 5 for typical expansion tank piping.

I::m I I£qm]I:| =[o,]iI_ :ll:t ::1e]I_l,__ii =1;t I:I_,__ii ::1

If the boiler is to be used in conjunction with an indirect- fired water heater, refer to Figure 11 for typical piping. Follow the instructions provided by the water heater manufacturer. Pipe the water heater as a separate zone.

For new or existing systems that must be freeze- protected:

Use only inhibited propylene glycol solutions of up to 50% by volume with water. Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.

Glycol in hydronic applications is specially formulated for this purpose. It includes inhibitors

which prevent the glycol from attacking metallic system components. Make certain that the system

fluid is checked for the correct glycol concentration and inhibitor level.

2. The anitfreeze solution should be tested at least once a year and as recommended by the antifreeze

manufacturer.

Antifreeze solutions expand more than water. For example, a 50% by volume solution expands 4.8%

in volume for a temperature increase from 32°F to

180°F, while water expands 3% with the same temperature rise. Allowance must be made for this expansion in system design.

For more information, consult the Peerless Water

Installation Survey and the antifreeze manufacturer.

SUPPLY TO

SYSTEM

RETURN FROM

SYSTEM

ZONE VALVES

INDIRECT FIRED

WATER HEATER

HOT DOMESTIC

WATER

SUPPLY

COLD

DOMESTIC _-

WATER SUPPLY

SUPPLY

TANK

BALANCING

VALVE

]

BALANCING

VALVE

i I

SYSTEM

CIRCULATOR _

DRAIN

Figure 11: Typical Piping with Indirect-Fired Water Heater

Lt/:1_/Jl_[,':t

4; VENTING

|_,!1 h,'_ii::[d; f_,_ II o] ;f_,_;Iil -"[o_o]g

The MIiMIH boiler is equipped with a built in draft hood This device is designed to:

a provide for the ready escape of flue gases from

the boiler in the event of no draft.

b. prevent a backdraft [Tomentering the boilen

c. control stack draft during operation.

These tasks are accomplished without the extra height requirements of a separate draft hood.

The draft hood relief opening is the large rectangular passage at the front of the boiler. Make certain that

there are no obstructions to airflow in front of this opening.

A vent safety shut off switch is located within the draft relief opening to shut off the boiler in case of a blocked vent condition. See Section 7B for details

regarding this device. See Figure 16 in Section 6 (Electrical) for spill switch location.

The vent damper can be mounted directly onto the round draft hood outlet (vent connector) on top of

the boiler, or in vent piping close to the boiler. See the Vent Damper Installation Instructions below.

Do not use one vent damper to control two or more heating appliances. See Figure 12.

Follow these and the installation instructions that are included with the vent damper. Observe the cautions

and warnings that accompany all instructions.

Make certain that minimum clearances provided in the vent damper manufacturer's instructions are maintained and that adequate space is available for

damper accessand service.

Orient the damper operator to facilitate connection of the harness with the vent damper and boiler. Note flue gas flow arrow on vent damper and orient as required. For installation with damper mounted in

vertical position, see Figure 13. For installation with damper mounted in horizontal position, mount the

unit as shown in Figure 14 to avoid excessive heat

on the operator or condensation drips into the operator.

BOILER

c:::::::_ c:::::::_

c:::=_ c:::::_ c:::::::_ c:::::::_

OTHER

HEATING

&PPLIANCE

INCORRECT

CORRECT

Figure 12: Venting Multiple Appliances

_o,,NkVJ:h,_/ uI:JI:,,]h,1[€_V_*l_._I D][o,]-"I hVjh._I_"

1. Install vent piping in accordance with Part 7. Venting of Equipment, National Fuel Gas Code, ANSI Z223. I/NFPA 54 or applicable provisions of the local building codes.

2. Inspect the existing chimney and lining for structural soundness, corrosion and perforations. Repair as

neces_Fy.

3. Install vent pipe to slope upward at least I/4" per lineal foot between the draft hood outlet and the

chimney.

Before connection of joints, inspect the vent pipe interior for foreign objects such as tools, equipment,

rags, etc. and remove if present.

Insert vent pipe into but not beyond the inside wall of the chimney flue.

Do not connect vent connectors serving appliances vented by natural draft into any portion of

mechanical draft systems operating under positive

pressure.

Support horizontal portions of the venting system to prevent sagging by use of metal strapping or equivalent means. Locate supports at no more than four (4) foot intervals.

SLOPE uP A MINIMUM

OF 1/4" PER FOOT

VENT

DAMP

DRAFT _ _

f¢3

HOOD

RELIEF

flVENT TO

CHIMNEY

SUPPORT AS REQUIRED,

DRAFT HOOD OUTLET

Figure 13: Venting with Vent Damper in Vertical Position

SLOPE UP VENT A MINIMUM DAMPER

OF I/4" PER FOOT_,,_

_VENT TO

CHIMNEY

11 O'CLOCK i O'CLOCK

POSITION POSITION

SUPPORT AS REQUIRED

r i

HEAT

_CONDENSATION

ZONE

7 O'CLOCK _5 O'CLOCK

POSITION POSIT'ON

DO NOT MOUNT DAMPER

OPERATOR IN SHADED REGION

SECTION A

Figure 14: Venting with Vent Damper in Horizontal Position

At the time of removal of an existing boiler, follow these steps with each appliance remaining connected to the

common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation:

a. Seal any unused openings in the common venting

system.

b, Visually inspect the venting system for proper size

and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion and other

deficiencies which could cause an unsafe condition.

Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on any clothes dryers and any

appliance not connected to common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so appliance will operate continuously.

Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette,

cigar, or pipe, After it has been determined that each appliance

remaining connected to the common venting system properly vents when tested as outlined above, return

doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous

conditions of use. Any improper operation of the common venting

system should be corrected so that the installation conforms with the current edition of the National

Fuel Gas Code, ANSI 7-223.1/NFPA 54. When resizing any portion of the common venting system,

the common venting system should be resized to approach minimum size as determined using the appropriate tables located in the chapter "Sizing of Category IVenting Systems," in the current edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

SLZeand w,-_tal[the gas supply plpmg properly in ordeT to provide a supply of gas sufflc,ent to meet

the maximum demand wlthout undue loss of pressure between the meter and the boder

Determine the volume of gas to be provlded to the boller in cublc feet per hour To obtain this value,

thv]de the Btu per hour rating (on the boiler rating plate) by the heating value ot the gas ]n Btu per cubic feet Obtain the heating value of the gas from the gas suppher As an alternatwe use Table 1 2 or 3 on the next page to obtain the volume of gas to be p_ovLded to the boder

Use the value obtained above as the bas_s for p_pmg SLZmg SLze the gas piping m accordance w_th Table

4 Consult the Natzonal Fuel Gas Code ANSI Z223 I,'NFPA 54 for other slzlng optmns

Locate the drop pipe adjacent to, but not m front of the boder

Install a sedlment trap See Figure 15 Locate a tee m the drop plpe at same elevatlon as the gas inlet connechon to the bo_Ler Extend the drop p_pe to a

pLpe cap Install a ground joint umon ahead of the gas control

assembly to permit serwcmg of the control Some Localcodes reqmre an additional serwce valve when using the combmat,on gas controls If your code reqmres such a valve a suggested IocatLon Lsshown in FLgure 15

Use a pipe joint sealing compound that is resistant to the action of tiquefied petroleum gas. A non-resistant compound may lose sealing ability in the presence of this gas, resulting in a gas leak and fire or explosion

potential.

Check pLpmg for leaks Use an approved gas detector, a non-corroslve leak

detectlon flu,d or other leak detecUon method If leaks are found turn off all gas flow and repalr as

necessal_j

j _ SERVICE

-----JAC K ET

_GJ. UNION

_ I _fSEDIMENT TRAP

_/FLOOR LINE

Figure 15: Gas Connection to Boiler

8 Disconnect the boiler and its ]ndlwdual shut-off valve

from the gas supply piping system dunng any pressure testLng of that system at test pressure m excess of i '2 psLg (3 5 kPa)

Do not subject the gas valve to more than 1/2 psi pressure. Doing so may damage the valve.

Isolate the boiler from the gas supply p_pmg system by closing _ts _ndw_dual serwce valve dunng any pressure testing of the gas supply plpmg system at

test pressure equal to or less than i 2 pslg (3 5 kPa)

9 Mlmmum permlsslble supply pressule for purposes of

,nput adjustment (Inches Water Column)

MI-09 Standing Pdot Natural Gas 5 2" All other MI/MIH Natural Gas 5 0"

All MI LPGas II 0"

Maximum permlsslble supply pressure to the boder (Inches Water Column)

All MI/MIH Natural Gas 13 5" All MI LP Gas 13 5"

When checking for leaks, do not use matches, candles, open flames or other methods that provide a source of =gnition.This can ignite a gas leak,

resulting in fire or explosion.

[tl :I-2[_igl_tl

Table 1: MI Boiler- Natural Gas

Model Input

(Cubic F_Hr)

MI 03 70

MI-04 105 MI-05 140 MI Ofi 175 MI 07 195 M] 0_ 227 5 MI 09 260

Based on i000 Btu/Cubic Ft

Table 2: MI Boiler - LP Gas

Model Input

(Cubic FI/Hr)

Ml-03 28 MI 04 42 MI-05 56 MI-06 70 MI-07 78 M[ 08 91 MI-09 104

Based on 2500 Bt_ICubicFt

Table 3: MIH Boiler - Natural Gas

Model Input

(Cubic FffHr)

MIH-03 65 MIH-04 97.5 MIH 05 130 MIH 06 162.5

Based on 1000Btu/CubicFt,

Table 4: Pipe Capacity

Capacity of pipe of different diameters and lengths in cu. ft. per hour with pressure drop of 0.3 in and specific gravity of 0.60. No allowance for an ordinary number of fi_ings is required.

Pipe V4" l" 11/4" 11/2u

Length

Feet Pipe Pipe Pipe Pipe

I0 278 520 1,050 1,600 20 190 350 730 1,100 30 152 285 590 890

40 130 245 500 760 50 115 215 440 670

60 105 195 400 610

Multipliers to be used with the above table when the specific gravity of the gas is other than 060:

Specific Gravity . 0 5 055 0.60 065 070

Multiplier ........ 110 1,04 1.00 0.962 0.926

6.*ELECTRICAL

Install all elechlcal wrong m accoldance wLth the National Elecmcal Code and local requirements

This umt when installed must be electrically grounded in accordance with the requirements of the authority having JUrlSdtctton or, in the absence of such requirements, with the current edlbon of the National Electrical

Code, ANSI/NFPA 70.

r_,! iv=,il;llL_[€

_.41[*(o] L_iiII-'{e]I_

See Figure 16 for locatEon of wrong and conh'ols Use Figures 17 and 18 to connect the boder to a power supply and to connect components to the

boiler

Connect the bo=le_ by a separate, permanently live electrLcal supply hne with a fused switch

Connect _he vent damper harness to the polarLzed

connector Lnthe boder vest=bule as shown m

Figure 16

4 Adjust the thermostat heat antlcipator to 0 2 Amp

For proper locatlon of controls and accessories refer to Flgure 16 and Section I i

See the attached control sheets for specific details

regarding the instal]atlon of the various conlzols

Thin boiler is supphed wlth safety dev=ces m addttlon

to the hmlt For a descnpt_on of these dewces and how they work to ensure the safe operatlon of the

boiler, see Secuon 7B

If the clrculator [smounted m the supply plpmg,

provLde longer wrong harness as requLred

See Figure 20 for typLcal wiring w=th zone valves See

Figure 21 for t_pLcal wrong with zone cLrculators When wLrlng a zoned heating system, follow all apphcable codes ordinances and regulations

Do not power zone valves directly from the boiler limit. Doing so will greatly reduce the life of the

transformer Use a separate transformer sized to handle the total of all zone valve electrical loads

i9 LIHL OL IACE

T,:, THEPrlOST_T _

Lit IIT -_._

C, Jr I-L_IPE_ POL'I:t2ED

F _,r Jr JEC T,)_' i IPI3BDL

E JlLC_ P_ /IBLILE,

_- _ TO ','EN7 DAMPEP

_ "---... _ GLC,CXED _Er_T SWITCH

DB_E_.',' nbr4 CO_L_

LeL_t IE _JCILLOU T

Figure 16: Wiring, Controls and Safety Devices

CONNECTION DIAGRAM

24V THERMOSTAT (BY OTHERS)

.... LB148£ C_81NATIO_i DISCONNECT

" r.....

NSTALLF_ _ 60 LI BK

R SUPgLY L2 SER_C£

eK_ THESE]_TO--

0{,.!B.i l 'i

I _ERMO¢OUpI "_

L2T22_ ,

I i

CONNECTOR rifle RelJ_e,4JT S_l F _=t__

w V#_lTE

C_NEC1]ON DIAGRAM LEG{.ND 0 ORANCE

BL BLUE

-- UNE VOLTAGE _IZE _¢ A_ TYPE TW, TFF'N OR 1EW/A_ _IRE

-- UNE VOLTAGE _ZE 16-18 AWG TYPE I%V TFFN OR I_W/A_%a V_RE

-- LOW '_LTAGE SIZE 18 A_G TYPE TC CABLE

-- -- LOW VOLTAGE SIZE 16-18 AWG WR[ TYPE TEW/AV_, TFFN _R£

NOTESm

I) ALL _RING MUST COMPLY V_IH APPUANC[ CODES, ORDINANCES AND REGULATIONS

2) IF ANY OF 1HE ORIGINAL MRE AS SUpPU_O _4TH THE ApPLiANCE MUST BE

REPLACED, IT MUST B_ REPLACED V4T_ _RE AS SHO_

LADDER OIAGRAM

115/60/i L2

pOV_ER

SUPPLy

C_ C2

FUSE{) RI

DISCONNECT SER_CE

S_TCH S_4TCH pR_MAR Y

TR ANS_Oei4 ER

SZCONDARY

I B2,

I PRS BvS

L 1%.

RZ LIMIT I

I T_ERNOCOUP_

LAODER DIACRAM I[G_NO I

-- 120v INTERNAL WIRIN_ i

-- 120V EXTERNAL _IRtNG [

24V INI_RNAL _,tRING

-- 24V [XERNAL _IRINg

---- MIU IVOLT _RING

0 L_I4BE _RMtNAL

Figure 17: Wiring and Connection Diagram -Standing Pilot (Continuous Ignition)

I'_ F.']:[olli:l_[o,]:l [o]d[oir,,l=l;__41/[o]_

I. Standing Pilot (See Figure 17 above)

a. The vent damper is continuously powered. On a

call for heat, limit relay R is energized, which energizes:

• the circulator (when used) through contact R1, and

• the vent damper operator through contact R2, provided that the high-limit switch is closed.

The vent damper operator opens the damper.

b. Once the damper is proven open, the gas valve

energizes, provided that all of the following conditions are met:

• the pilot thermocouple is proving flame

• the blocked vent switch is closed, and

• the flame rollout switch is closed.

Pilot flame is monitored through the pilot thermocouple. If pilot flame is lost during a call for heat, main and pilot gas flow will be shut off. The valve must then be manually reset by following the Lighting Instructions mounted on the jacket panel and included in Section 7 of this

manual.

c. When the call for heat ends:

• Limit relay R de-energizes, which opens contacts RI and R2.

• The circulator shuts down.

• The gas valve de-energizes.

• The vent damper closes.

d. If temperature exceeds limit setting, main burners

shut off and circulator continues to operate.

" i:!! ;["_e_2_

CONN£CTI_ DIAGR_

L*_[R [_AGRAM

L 1 11p_o_45_LR_1 L2

¢1 C2

FUSED RI

D'S_EC T _5_ T_I_

T ....

HIGH I

R U_IIT

2 8 R B! I I

LAD{)_R DIAGRAM L[G[NO [ 1_+41T_ __AM_ I

-- ND I

-- 120V INT_RN_L I_IR1NG I _PPILOT

-- t20v [XT_RHAL_RIN_ L _BNC)]

---- _4V iN.HAL _4RIN_

-- -- 24V [XTERNAL _I_IN_

....... _>iLOT _RIN@

o LO14_ T_R_IN_-

Figure 18: Wiring and Connection Diagram - Intermittent Ignition

2. Intermittent Ignition (see Figure 18 above) a. The vent damper is continuously powered. On a

call for heat, limit relay R is energized, which

energizes:

• the circulator (when used) through contact

RI, and

• the vent damper operator through contact R2, provided that the high-limit aqu_stat switch is

closed.

The damper operator opens the vent damper.

b. Once the damper is proven open, the ignition

circuit within the gas valve energizes, provided that all of the following conditions are met:

• the blocked vent switch is closed, and

• the flame rollout switch is closed.

c. When the call for heat ends:

• Limit relay R de-energizes, which opens contacts R1 and R2.

• The circulator shuts down.

• The gas valve de-energizes.

• The veat damper closes.

d. If temperature exceeds limit setting, main burners

shut off and circulator continues to operate.

START

APPLY24 VAC ITO APPLIANCE

I THERMOSTAT ICALLS FOR HEAT

TRIAL

FOR IGNITION

MAIN BURNER

OPERATION

I FLAME SIGNAL

DETECTED_ NO

I INTERNAL CHECK OKAY? I NO

_YES

I • PILOT VALVE OPENS I

• IGNITER POWERED

PILOTLIGHTSAND FLAME NO

IS SENSED DURING /_-_

TRIAL FOR IGNITION?

YES

[ " IGNITER OFF I• MAIN VALVE OPENS

• WAIT FOR FLAME SIGNAL

TO DISAPPEAR

• PILOT VALVE/IGNITER

REMAIN OFF

• PILOT VALVE CLOSES L

• IGNITER OFF

[ THREE-SECOND FLAME JFAILURE RECYCLE DELAY

I FLAME SIGNAL LOST?

I THERMOSTATCALL FOR IHEAT ENDS

I • MAIN AND PILOT VALVES CLOSE

END

L/_ IGNITER WILL TURN OFF ABOUT 30 SECONDS INTO THE TRIAL FOR IGNITION.

IF THE PILOT FLAME HAS NOT LIT, IT WILL TURN BACK ON FOR THE FINAL 30 SECONDS OF THE 90 SECOND TRIAL FOR IGNITION. THE PILOT VALVE

WILL BE ENERGIZED DURING THE ENTIRE TRIAL FOR IGNmON. THIS IS NORMAL OPERATION FOR THIS GAS IGNITION SYSTEM.

• MAIN AND PILOT VALVES CLOSE I

FLAME LOST MORE THAN NI NO FIVE TIMES IN ONE

CALL FOR HEAT?

I l

FIVE-MINUTEDELAYRETRY I

Figure 19: Intermittent Ignition System Operating Sequence

I15V/60HZ _LI (HOT}

TO MAIN _ _2

DISCONNECT

g_TCH J GND

dUMPER FACTORY

INSTALLED--

F - I F I !

AOOASTAT

RELAY

(HONEYWELL

LS148E)

// _ ZONE I /_ _ ZONE 2 \ ZONE 3

, _× I I j _c× I

[ [ ' i I •

- I I q I I 7 1

[ 7 I L _ , 71 1 _

v I I y I y] l

[

ZONE , ZONE 2 ZONE 3

VALVE VALVE VALVE

NO_

_ AlL WIRING MUST COMPLY WITH APPLICABLE CODEg• OROLNANCES

AND PEGULATIONS

(_ WIRE REMAINDER OF AQUASTAT RELAY IN ACCORDANC_ WITH

SYSTEM WIRING DIAGRAM SUPPLIED

kkGX.N_

UN_ VOLTAGE LOW VOLTAGE

Figure 20: Zone Wiring with Zone Valves

I20V/6OHZ _LI (_OT)--

TO MAIN

DISCONNECT L2

SWITCH _GND

ZONE 1

THERMOSTATm _ 24V

I I

JUMPER FACTORy

LIMI T(HONEYWELL

LBI48E)

ZONE 2 i

CIRCULATOR i

BOILER

CIRCULATOR

(ZONE I)

(_) ALL ',_RING MUST COMPLY '_TH APPLICABLE CODES, ORDINANCES

AND REGULATIONS

(_ _RE REMAINDER OF LIMIT IN ACCORDANCE _TN

SYSTEM _R_NC DIAGRAM SUPPLIED

ZONE 2

THER_OvSTAT

I_ -_ [NSTALLE O

S_ICHING

RELAY

ZON£ 3

CIRCULATO_ I

L L ............. •

L .........

- LINE VOLTAGE LOW VOLTAGE

ZON[ 3

IHERMOSTAI

24V

INSTALLED

S_TCHING

RELAY

Figure 21: Zone Wiring with Circulators

7. START-UP PRO_GI RES +

f-'l [a"[o) L'+I"JII:IIIIh'_[€"li l -"I=IIh';F-"+lIr-"1! l;_li to] L_

Cont£rm that all water gas and electnclly are turned off

Inspect the boiler combu,,t]on chamber for foreLgn objects and remove if present

Check phystcal cond]tton of burners and pilot Make certain that there are no unusual bends or

perforations m the burners or pilot Replace components if necessary

Verify that water pLpmg venting gas ptpmg and electrical wlrLng and components are mstalled properly Refer back to prevtou+ sections of these

mstructtons as well as egutpmen[ manufacturer's mstruchons as necessary

Fill the boiler and system with water making certain to vent all air from all points in the system To check

water level in the system open and close each vent

m the system Water should exit from each vent

when it _sopened The pressure reducing valve on the fill hne w=ll

typically allow the system to be hlled and pressurized to 12 pm Consult the vab+,eand expansion tank manufacturer for mote specff,c reformation

Check lotnts and fitting+ throughout the system for Leaks [f leaks are found dram the system and repatr as required

i0 11

Connect a manometer to the gasval_,e on the valve outlet (ga, manifold) Use the 1 8 NPT tappLng prowded

Confirm that the gas supply pressure to the boiler Rs above the mlmmum and below the maximum values

for the gas being used See the end of Section 5 for these values If a supply pressure check _s reqmred _solare the boiler and gas valve before performing the pressure check If the supply pressure is too high or too low contact the gas supplier

Turn on electrtctw and gas to boiler

Light the boiler by followmg the Llghnng Operating

Instrucnons label mounted to the jacket panel The Lnltlal Ignition may requve several tries as the piping ts purged of atr

Use the sequence descnptlons m Figures 17 18 and

19 in Section 6 (Electrical) to follow l,ght-off and

shutdown sequences and to asmst m dmgnosmg problems If the boiler does not funcbon properly

consult Section 8, Troubleshooting

The gas manifold and control assembly are made of

gas-tlght completely factory assembled and installed components of the base assembly See Figure 22

and 23

!UUUL

'_ PILOI _EAD

THERMOCOUPLE LEAD

SECTION A A

Figure 22: Gas Valve, Manifold and Burner Assembly - Standing Pilot (Continuous Ignition)

-GAS VALVE

S ORIFICE

_\ MAN,FOLD

A"_ _TEST TAPPING

PILOT TUBING

SECTION A A

Figure 23: Gas Valve, Manifold and Burner Assembly - Intermittent Ignition

7 GAB PRESSURE REGULATOR

/ ADJUSTMENT SCREW

22_BURE / _UNOERCA_SCREW)

TAPLET_ouUTLETIN TLET PRESSURE TAP

L THERMOCOUPLE _ PILOT ADJUSTMENT SCREW

CONNECTION (UNDER CAP SCREW) (STANDING

PILOT ONLY)

NOTE: LOCATIONS ARE SIMILAR FOR STANDING

PILOT AND INTERMITTENT IGNRION VALVES.

Figure 24: Valve Tapping and Adjustment Screw Locations

FOR YOUR SAFETY READ BEFORE OPERATING

I WARNING: If do follow these instructions a fire or explosion result

you

not

exactly, may

causing property damage, personal injury, or toss of life. I

A. This appliance is equipped with an ignition device • If you cannot reach your gas supplier, call the fire

which automatically lights the pilot. Do not try to department.

light the pilot by hand.

BEFORE OPERATING smell all around the

appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO OF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

Use only your hand to slide the gas control switch,

Never use tools. Ifthe switch will not slide by hand, don't try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of

the control system and any gas control which has

been under water,

_ OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this label.

5. If the gas valve is not visible, remove control access panel.

2. Set the thermostat to the lowest setting.

3. Turn off all electric power to the appliance.

4. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to

light the pilot by hand.

/--GAS CONTROL

SWITCH

6. If the gas control switch is not in the "OFF" position, slide the switch to "OFF".

7. Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety

information above this label. If you don't smell gas,

go to the next step.

8. Slide the gas control switch to "ON".

9. Replace control access panel, if applicable.

10. Turn on all electric power to the appliance.

11. Set the thermostat to desired setting.

12. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE _

1. Set the thermostat to lowest setting. 4. Slide the gas control switch to "OFF".

2. Turn off all electric power to the appliance if service 5. Replace control access panel, if applicable. is to be performed.

3. If the gas valve is not visible, remove the control

access panel. SV95011SV9601 9318

Figure 25: Operating Instructions

I[,-']t-'; • ,'_ B • "]

FOR YOUR SAFETY READ BEFORE LIGHTING

A. This •ppU•nce has a pilotwhich must be lighted by

hand. When lighting the pilot, follow these instruc- tions exactly.

B. BEFORE OPERATING smell •round the appliance

area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle

on the floor.

WARNING: Ifyou do not follow these instructions exactly, a fire or explosion may

result causing property damage, personal injury or loss of life.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance

• Do not touch any electric switch; do not u•e any phone In your building.

• Immediately call your gas supplier from a

neighbor's phone. Follow the gas suppller's

instructions.

• If you cannot reach your gas supplier, call the fire department.

Use only your hand to push in or turn the gas con-

trol knob. Never use tools. If the knob will not push

In or turn by hand, don't try to repair it, call a quali-

fied service technician. Force or attempted repair

may result in a fire or explosion.

Do not use this appliance if any pert has been under water. Immediately cell a qualified service techni-

cian to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

LIGHTING INSTRUCTIONS

1. STOP! Read the safety information above on this

label.

2. Set the thermostat to lowest setting.

3. Turn off •11 electric power to the appllence.

4. If the gas valve is not visible, remove control aceess

panel.

5. If the gas control knob is not in the "OFF" position, turn the knob clockwise _ to "OFF."

Gas Control Knob F'- RED RESET BUTTON (shown in _OFF" /

position) -_ /

J*o_ id 41

. _1 INLET

6. Walt five (5) minutes to clear out any gas. Then

smell for gas, including near the floor. If you smell gas, STOP; Follow "B" in the safety information above on this label. If you don't smell gas, go to the next step.

7. Remove the pilot access panel, if supplied, located

below and behind the gas valve directly above burn- er tubes

Find pilot--follow metal tube F_ from gas valve. The pilot is

between two burner tubes.

Pilot Burner

9. Turn the gas control knob counterclockwise #"% to

"PILOT."

10. Push In red reset button all the way and hold in.

Immediately fight the pilot with • match. Continue to hold the reset button in for •bout one (1) minute after the pilot is lit. Release button and it will pop

back up. Pilot should remain llt. If it goes out, repeat

steps 5 through 10.

• If button does not pop up when released, stop

and immediately call your service tachnici•n or gas supplier.

• If the pllet will not stay lit after several tries, turn the gas control knob to "OFF" and cell

your service technician or gas supplier.

11. Replace pilot access panel, if applicable.

12. Turn gas control knob counterclockwise

to "ON."

13. Replace control access panel, if applicable.

14. Turn on all electric power to the •ppllance.

15. Set thermostat to desired setting.

_TO TURN OFF GAS TO APPLIANCE _

1. Set the thermostat to lowest setting.

2. Tum off all electric power to the appliance if service

is to be performed.

3. If the gas valve is not visible, remove control access panel.

4. Turn the gas control knob clockwise (_ to "OFF."

5. Replace control access panel, if applicable.

H24V VR8200 9177R

Figure 26: Lighting Instructions

IsJ V-ll_i ilJ-*t iLhl_l i [*]; L:JII[*]t 11[€1r-"!.:1I_K*PA

:]q '=*,[*]=_//;{*]n Im]:_'[*_;]lM/[*]_:

See Figure 16 in Section 6 (Electrical) for locations of these devices.

FLAME ROLL-OUT SAFETY SHUT-OFF SWITCH (FLAME ROLL OUT SWITCH) - A thermally

activated switch located between the first burner from the left and the manifold bracket. The flame

roll-out safety shut-off switch will sense excessive temperature caused by continued flame roll out and

shut down main burner gas. This is a non-recycling switch that must be replaced once it has been

activated and the cause of the roll-out eliminated.

VENT SAFETY SHUT-OFF SWITCH (SPILL SWITCH) - A thermally activated, manually

resetable switch located in the draft hood relief opening. If venting system becomes partially or

totally blocked, the vent safety shut-off switch will sense excessive temperature caused by flue products exiting the draft hood relief opening and shut down

main burner gas.

LIMIT (AQUASTAT) - A thermally activated, manually adjustable switch located on the left side of the boiler, towards the top and rear. The temperature sensing element is placed in the supply and will shut down main burner gas ifthe supply water exceeds the preset temperature limit. This is a recycling switch that will automatically reset when the supply water falls below the preset temperature.

LOW WATER CUT-OFF (FOR GRAVITY SYSTEMS OR HOT WATER BOILERS INSTALLED ABOVE

RADIATION LEVEL) - A level-sensing device (float or probe) located in supply piping near the boiler. If water level in the system drops below the control's position, it will shut down main burner gas. The

control will automatically reset once the water level rises above its position.

I [*4:I=[NNh_(€4 :|lJ:t_J_:t IIL_I'._IJ

Using the manometer setup installed in part 7A, set manifold pressure as follows for various gases.

a. Natural Gas .......... 3.5" Water Column

b. LPGas ............ I0.0" Water Column

To adjust gas pressure, turn adjusting screw of gas . pressure regulator counterclockwise to decrease

pressure, clockwise to increase pressure. Refer to Figure 24 for location of gas pressure regulator.

Replace the cap screw when adjustment is complete.

In no case should the final manifold pressure vary more than ±0.3 inches water column from the

above specified pressures. Any necessary major changes in the flow should be made by changing the size of the burner orifice spuds.

When adjustment is complete, turn off boiler, gas flow and electricity to boiler. Remove manometer

connection from valve and plug tapping with plug provided. Turn utilities back on and resume

checkout.

To maximize thermocouple life, particularly on natural gas installations with gas supply pressures above 9" W.C.. reduce the pilot gas flow

Turn off all electric power to the appliance. Turn Gas Control Knob to "Pilot" position as shown

in Figure 26.

Locate and remove the pilot adjustment cap screw using Figure 24.

Remove pilot observation port cover on base front panel.

Turn the pilot adjustment screw clockwise until the pilot flame extinguishes. Then increase the pilot flow just to the point that the gas valve holds in when

relighting the pilot per steps 9 and 10 of Lighting Instructions in Figure 26 (turn screw no more than an i/8 turn).

The first few turns of the adjustment screw may not cause any change in the pilot flow, Subsequent partial turns of the adjustment screw may have a great impact on pilot flow.

4. Turn on electric power to the appliance.

5. Turn Gas Control Knob to "On" position per the Lighting Instructions in Figure 26.

6. Verify pilot remains lit after shutdown from a boiler

"ON" cycle of at least ten minutes. If pilot

extinguishes, follow Lighting Instructions in Figure 26

and again slightly increase pilot flow.

7. Make a final slight increase in the size of the pilot to

ensure sufficient pilot signal under all operating conditions, just to the point that you observe a slight

increase in the size of the flame (no more than an I/8 turn).

8. Replace adjustment cap screw and observation port

cover.

I. Refer to rating label mounted on the jacket top panel

to obtain the rated BTU per hour input. In no case shall the input to the boiler exceed the value shown on the rating label.

2. Check input by use of the following formula (Peerless suggests reading meter for 2 Cu.Ft.):

BTU/Hr. Input=3600 x F x H

3600 - Seconds per hour

F - Cubic Feet of Gas Registered on Meter

H - Heat Value of Gas in BTU/Cubic Feet

T - Time in Seconds the Meter is Read

As an alternative, use Table 5. Use the heating value provided by gas supplier. Use a stopwatch to record

the time it takes for 2 cubic feet of gas to pass through the meter. Read across and down to

determine rate.

Table 5: Meter Conversion - Natural Gas

Burner inputs in Btu/hr for various meter timings and heat values. (Tables based on 2 cubic feet of gas through meter).

Time that Heat Value of Gas

meter is (Btu/cubic foot)

read (sec)

25 30

35 40

50 55 60 65 70 75 80 85 90

95 I00 105 110 115 120 125

1000

288000 240000 205714

180000 160000

144000 130909 120000 110769 102857

96000 90000

84706

80000 75789

72000 68571 65455 62609 60000 57600

1025 1050

295200 302400 246000 252000

210857 216000

184500 189000 164000 168000

147600 151200 134182 137455 123000 126000 113538 116308 105429 108000

98400 100800 92250 94500

86824 88941 82000 84000

77684 79579 73800 75600 70286 72000 67091 68727

64174 65739

61500 63000

59040 60480

I;;I [O4:l=(O4[_eleJld :J;{ole]=lmlgl;|

I. After starting the boiler, be certain all controls are

working properly. Check to be sure that the limit will shut off the boiler in the event of excessive water

temperature. This can be done by lowering the limit setting until the main burners shut down. When proper limit function is confirmed, return the dial to

its previous setting.

2. To check operation of the ignition system safety shut-off features:

a. Standing Pilot:

i) Turn the gas control knob counterclockwise to

"PILOT". The main burner should go out and the pilot should remain lit.

ii) Extinguish the pilot flame. Pilot gas flow

should stop within 2-I/2 minutes. Complete shutdown is proven since the safety shut-off valve has stopped main and pilot gas flow.

iii) Reset the boiler by following Lighting

Instructions.

i0.

iv) Observe boiler operation through one

complete cycle

b. Intermittent Ignition System:

i) Turn gas supply off

it) Set thermostat or controller above room

temperature to call for heat. Watch for igniter glow at pilot burner.

iii) Igniter will continue to glow for 30 seconds,

de-energize for 30 seconds, then re-energize and glow for another 30 seconds. It will then de-energize for 5 minutes before restarting the sequence.

iv) Turn gas supply on.

v) Reset the boiler and conlrol by following

Operating Instructions.

vi) Observe boiler operation through one

complete cycle.

Low Water Cut-Off (if used) - Consult the manufacturer's instructions for the low water cut-off

operational check procedure.

Check the system to make sure there are no leaks or overfilling problems which might cause excessive

make-up water to be added. Make-up water causes liming in the boiler and brings in oxygen. Oxygen

can cause severe damage to the boiler though oxygen corrosion pitting.

Check the expansion tank and automatic fill valve (if used) to confirm that they are operating con-ectly. If either of these components causes high pressure in the system, the boiler relief valve will weep or open, allowing fresh water to enter the system.

Do not allow the system controls to subject the boiler to excessively low water temperatures, which would

cause condensation of flue gases and corrosion of the boiler. Operate the boiler at a temperature above 130°E Adjust the boiler limit as required to maintain boiler temperature above this level.

Check the general condition of the system including piping support, joints, etc. Check cleanliness of the radiators, baseboard units and!or convectors. Clean them to the extent possible. If radiators do not heat evenly, vent any remaining air from them.

Review operation and User's Information Manual with end-user.

Complete the Warranty Card and submit it to Peerless Heater Company.

Hang the Installation, Operation and Maintenance Manual and User's Information Manual in an

accessible position near the boiler.

In the event of a shut-down caused by a pLlot outage actLon of the blocked vent shut-ott sw_tch or flame Toll-

out safety shut-off swltch effechng a shin-down of the

mallqburners

a Refer to the Lighting, Operating Instructions Ln

Figures 25 and 26 to properly turn oft the gas to the boiler

b Turn off all electric power to the boder c Call a qualified heatlng servlce orgamzahon or Local

gas company and have the cause of the shut-down mveshgated and corrected

d Refer to L_ghtlng'Operatmg Instruchons to

re start bo_ler

:! I |'{o]lJ :| i :_'t : [oil) i h,_[_ [_lll I I] :_

Use Table 6 to assist m determining causes and prowdmg corrective actions to boiler problems Refer

also to Figure 27 to _oubleshoot the [merm_ttent lgnLtLOn System Control These guLdes must be used only by

quahhed serwce techntoans These mdwlduals must tollow all apphcable codes and _egulat,ons ,n repair of

any bo,le_ problems

When servicing or replacing items that communicate with the bonier water, be certain that"

• There is no pressure on the boLler

• The boiler usnot hot.

• The power is off.

When servicing the gas valve or pilot, be certain that:

• The gas is off.

• The electricity is off.

Do not use this appliance if any part has been under water. Improper or dangerous operation may result. Immedmtely call a qualified service technician to inspect the bonier and to replace any part of the

control system and any gas control which has been

under water.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and

dangerous operation. Verify proper operation after

servicing.

Should overheating occur or the gas supply fail to

shut off, do not turn off or disconnect the electrical

supply to the pump.This may aggravate the problem and increase the likelihood of boiler damage. Instead,

shut off the gas supply at a location external to the appliance.

Inj ;[.luJ :_! _; [oD_ ni1_L_

Table 6: Boiler Troubleshooting Guide

Burners not functioning

] No power

2. Limit (aquastat) not working

3. Flame rollout switch open

4. Blocked vent switch open .5 Gas off at boiler gas valve

6 Gas off external to boiler 7 Plugged orifice spuds

8. Defective gas valve

9 Improper wiring

10 Vont damper malfunctioning

Burners will not shut down

Flashback or burning at orifice spuds.

Delayed ignition.

1. Defective gas valve.

2 Short circuit

I. Manifold gas pressure too low

2. Improperly sized/drilled orifice spuds.

3. Leaking gas valve 4 Burrs on orifice.

5 Low supply gas pressure.

6 Excessive downdraft or draft problems in

boiler room

l Insufficient pilot flame

2. Pilot burner/orifice clogged. 30verfiring. 4 Misaligned burners or pilot. 5 Draft problem in boiler room.

Excessive condensation in vent.

Boiler not heating properly.

Fumes or gas odors

I. Underfiring

2. Limit (aquastat) set too low.

3 Vent pipe too long.

4. Inadequate chimney or venting system.

1. Underflring

2 Limit set too low.

3. Air in system.

4. Circulator malfunctioning. 5 Circulation system clogged.

6. Incorred thermostat heat anticipator setting.

I. Leaks in gas piping or fittings.

2. Leaks in gas service line or meter

3. Obstructed chimney. 40bslructed flueways or vent.

5 Undersized chimney or vent, high draft loss

in vent

6 Draft problem in boiler room.

7. Overfiring.

8 Vent damper malfunctioning.

I Check line voltage wiring and fuses. 2 Check wiring and contacts, relay, temperature

setting. Clean and adjust as necessary

3. Replace switch Locate cause and correct.

4. Reset blocked vent switch. Locate cause and correct. 5 Start boiler using Lighting/Operating

Instructions.

6 Check any gas valves in the line. 7 Check, clean and re-install.

8 Use Figure 27 to troubleshoot intermittent

ignition gas valve. Replace if necessary.

9. Check and correct in accordance with wiring diagrams in Section 6.

I0 Refer to vent damper manufacturer's instructions.

Replace if necessary.

1. Use Figure 27 to troubleshoot intermittent

ignition gas valve. Replace if necessary.

2. Check and correct wiring.

I. Adjust to proper pressure.

2. Install correct spuds.

3 Replace valve.

4. Remove burrs.

5. Contact gas supplier if natural gas. Adjust

regulator if LP gas.

6 Check air supply, ventilation and venting system.

1. Increase pilot gas flow,

2. Clean pilot burner and orifice.

3. Reduce rate to input on rating label.

4. Realign burners or pilot.

5. Check air supply, ventilation and venting

system.

I. Increase rate to input on rating label.

2. Reset aquastat to higher setting.

3. Reposition boiler to reduce length.

4. Check chimney and venting recommendations.

1. Increase rate to input on rating label.

2. Reset aquastat to higher setting.

3. Vent air from all points in system.

4. Check circulator, replace if necessa W.

5. Shut down and cool boiler, drain and flush system.

6. Adjust heat anticipator.

I. Locate and repair or replace.

2. Shut down boiler and notify gas provider.

3. Check, repair and/or clean chimney.

4. Clean fiueways or vent and remove obstructions.

5. Check National Fuel Gas Code and vent

manufacturer's recommendations.

6. Check air supply, ventilation and venting system.

7. Reduce rate to input on rating label.

8. Refer to vent damper manufacturer's instructions.

Replace if necessary.

START

I • TURN OFF GAS SUPPLY

• ASSURE GAS VALVE SWITCH IS iN "ON" POSITION

• DISCONNECT SYSTEM CONTROL

HARNESS

• SET THERMOSTAT TO CALL

FOR HEAT

CHECK FOR PROPER VOLTAGE NI NO _[ AT CONTROL HARNESS (SEE INSET

A). VOLTAGE SHOULD BE 24V BETWEEN THERMOSTAT AND

24V COMMON, AND 24V BETWEEN 24V COMMON AND 24V HOT.

YES

ii i: ',Fo L

I, .:W,:oW RMSUPANDQ

NOTE: iGNITER WILL CYCLE OFF AND BACK ON ONCE GURING THE

90 SECOND IGNITION TRIAL

I YES

• TURN ON GAS SUPPLY _=_

• PILOT BURNER IJGHTS

YES

I MAIN VALVE OPENS AND

MAIN BURNER LIGHTS

YES

CHECK:

• LINE VOLTAGE POWER

• LOW VOLTAGE TRANSFORMER

• LIMIT CONTROLLER

• THERMOSTAT

•WIRING

• VENT DAMPER IS OPEN AND END

SWITCH MAKES

INSET A

UNPLUG PILOT BURNER CABLE. MEASURE VOLTAGE AT GAS VALVE

I '

HSI ELEMENT OUTPUT (SEE INSET B) 24V NOMINAL

I YEs

IREP CE'GN'TE MEROOA--OLYI

I RECONNECT PILOT BURNER CABLE I

END VIEW OF

24 VOLT CONTROL THERMOSTAT HARNESS

CONNECTOR

VOLTS

24 VOLT 24 VOLT COMMO

VOLTS HOT

CHECK FOR DAMAGED OR MISSING TERMINALS IN CONNECTOR

INSET B

REPLACE GAS VALVE I

I RECONNECTPILOTBURNER I

CABLE

• CHECK THAT PILOT GAS IS FLOWING. REPLACE GAS VALVE

WAIT TO ASSURE PILOT GAS TUBING

IS PURGED,

YES

,NO,

• MEASURE VOLTAGE BETWEEN 24V _ CHECK TRANSFORMER AND

HOT AND 24V COMMON LEADS TO GAS I i LINE VOLT SUPPLY

VALVE. MUST MEASURE AT LEAST

19.5 VAC WITH IGNITER POWERED. SEE INSET A TO IDENTIFY PROPER

LEAD. THIS CHECK MUST BE DONE

WITH THE GAS VALVE CONNECTED AND IGNITER POWERED,

YES

I RE PLACE IG NITER/FLAM E ROD ASSIEMBLY ]

CYCLE THERMOSTAT OFF AND BACK ON I

SYSTEM IS OKAY

I MAIN BURNER LIGHTS _1 REPLACE GAS VALVE

• CHECK THAT PILOT FLAME MAKES

GOOD CONTACT WITH PILOT BURNER FLAME ROD.

• CHECK FOR GOOD ELECTRICAL

CONNECTION THROUGH THE PILOT TUBING

• IF BOTH OF THE ABOVE ARE GOOO,

REPLACE IGNITER/FLAME ROO

ASSEMBLY.

I I

Figure 27: Intermittent Ignition System Troubleshooting Sequence

h',!_,!1_i i 4 _<'_!_,l7[.I:

9. MAINTENANce.

l-*! [€l _L'I_IP.t.

1 Disconnect this boiler from the gas supply piping

durung any pressure testing of the gas system

2 Check pipes adjacent to cold walls or in unheated

spaces Insulate and tape them Lfnecessary to be sure they can t freeze up Keeping the water moving

at all times will reduce the likelihood of freezing See Section 3 for antifreeze instnictions

3 If there is considelable foreign matter in the boiler

water the boiler should be shut down and allowed to cool then drained and thoroughly flushed out Use the dram valve at the bottom of the return connect,on to drain the boiler Pipe the dram cock to a suitable drain or containment dewce _f antifreeze is

used Flush the system to remove remaining matter If there is evidence that hard scale has formed on the

internal surfaces, the boiler should be cleaned by chemical means as prescribed by a quahhed water treatment specLal_st

There must not be signs of continuous wetness at the chimney If s_gns of continuous wetness are

observed, a qual_hed service agency must be consulted to modify the vent confLguratLon to prevent

the tormatlon of condensate

i:II Ill7,_!ll'lllVi_li/ll :loll!!llh"lll--'l"

Daily boiler observatLon can be performed by the owner If any potential problems are found, a quahfLed installer

or service techmc_an,'agency must be notffued

Remove any combustible materials, gasohne and

other flammable hqulds and substances that generate

flammable vapors from the area where the bouler LS contained Make certain that the boiler area has

ample air for combustion and venhlation and that there are no obstructions to the free flow of air to

and from the boiler

2 Observe general boiler conditions (unusual noises,

vibrations, etc )

Observe operatLng temperature and pressure on the combmatlon gauge located on the left side of the

boiler Boiler pressure should never be higher than 5 psl below the rating shown on the safety rehef valve {25 ps_g max,mum for a 30 psLg rating, 45 pslg maximum for a 50 pslg rating) The valve rating can be found on the top of the safety relief valve (see

Figure 5 for location of the safety relief valve) Boiler temperature should never be higher than 250 GF

4 Check for water leaks in boiler and system piping

5 Smell around the apphance alea for gas It you smell

gas. follow the procedure listed m the LLghtJng, Operatlng Instructions m Section 7

lllhll I 1 [! li'illrlll / i II :[o] I I 11tl li'lllll-'t :

I Flush float-type low-water cut-off (if used) to remove

sedLment from the float bowl as stated m the manufacturer's instructions

Uill_'5 [oli_i/l lii'llli,_i / I: i :io]II 1 :g h,'_lil..'ti

1 Check boiler room floor dlalns fol proper

functioning

2 Check function of the safety relief valve (monthly

unless speofled otherwise by manufacturer) by performung the follo_,,ungtest

a Check valve pLpmg to determine that ,t is

properly installed and supported

b Check boiler operating temperature and pressure c Lift the ti'y level on the safety relief valve to the

full open position and hold Ltfor at least five seconds or until clean water LSdischarged

Release the try lever and allow the valve to close If the valve leaks, operate the lever two or thlee times to clear the valve seat of foreign matter It may take some t_me to deteu'mne _tthe valve has

shut completely

e If the valve continues to leak. it must be replaced

before the boiler is returned to operation

f Check that operating pressure and temperature

have returned to normal

g Check again to confirm that valve has closed

completely and is not leaking

3 Test low-water cut-off (if used) as descnbed by the

manufacturer

4 Test limit as described in Section 7E "Check-Out

Procedure "

5 Test function of gas safety shut-off features as

described by gas valve and ugnution control manufacturer

6 Cycle the boiler at least once and check operation of

the vent damper

When servicing or replacing components, be absolutely certain that the following conditions are met:

• Water, gas and electricity are off.

• The boiler is at room temperature.

• There is no pressure in the boiler.

OUTE ON i

// [)ARK BL JL //_\

IN CC' OR , /

1. Check flueways and burners for cleanliness and dean if necessary. Use the following procedure if cleaning is required:

a. Refer to the Lightin_Operating Instructions in

Figures 25 and 26 to properly turn off the gas to the boiler.

b. Turn off all electrical power to the boiler.

c. Remove burners and brush gas outlet ports

lightly using a soft bristle brush.

d. Remove the vent pipe, vent damper, top jacket

panels and flue collector/draft diverter. Remove baffles on MIH models.

e. Brush flueways with wire brush.

To the extent possible, inspect inside of vent pipe and vent damper for obstructions in flow or vent damper movement. Remove or replace as

necessa[v.

Re-install baffles on MIH models. When replacing the flue collector/draft hood, be certain that the blanket seal between the flue collector and top

section makes a tight seal to prevent leakage of

the products of combustion.

h. Re-install the top of the jacket, vent damper and

vent pipe.

i. Re-install burners.

Figure 28: Standing Pilot and Main Burner Flame

INNER CONE IS BLUE

IN COLOR

FLA_EB

Figure 29: Intermittent Pilot and Main

Burner Flame

Inspect entire venting system for corrosion, support and joint integrity. Repair as necessary.

Check the pilot and main burner flame. See Figures 28 and 29. The pilot should provide a steady flame enveloping 3/8" to i/2" of the flame sensor. If required, adjust the pilot as stated in the gas valve

manufacturer's instructions. The main burner flame

inner cone should be approximately 1-1/2" high and

should have a very sharp, blue color characteristic.

10. BOILER DIMENSIONS 8 RA !N GS

II I,

_,111 ,

TEtd_"E_ - [iIPE

b- _ I_IFE l .

FL ,L_=

LIrL

FLLIEF

Figure 30: Boiler Views

i rllt_ ii

Table 7: Series MI/MIH Boiler Dimensions

Boiler

.ode] / Width

Number I A"

111:i I1i,.I1_Ia_ II: I :[l] II1_1:i 1]I_ I=1_._1[l]_p

Jacket Left of Jacket Rear of Jacket Vent Connector

Depth I Top _o F]oo_ to c ]ot Vent to c ] of Vent Size

B' C' D E" F

ML,MIH-03 121 -/' MI$4IH-04 15%"

MbMIH-05 19 _4" M['MIH-06 22%"

MI-07 26" MI-08 29%" MI-09 32_"

20_ " 31%" 61," 2013Le" 5 26%" 31%" 7n ,_ 20_,,J 5' 26%" 31%" 9_ ' 2Ill,#" 6"

26%" _ 31%" 11%." 21_'_ " 6" 26%" 31_ " 13" 21_q_" ; T'

29%" 31%" 14u =_" 235h_" I 8-

29_,_,, 31%- ; 16%- 24%e- 8..

Table 8: Series MI/MIH Boiler Ratings

DOE

Boiler A G A Heaung

Model Input Capacity Water Efficiency EMc[enc_ Water

Number MBH MBH3 MBHI2 (AFUE)3 I (AFUE)3 Content

.l IMIH I.i. Mi I ,H :Mill, MIH I (Gal)

M1-04 MIH-04 I05 1 975 86 i _l_ 75 1 70 802 I N/A _821 1 831 : 600 M 05 MH-05 140 130 _ 115 I 108 i_4 94 ° 802 1 N/A 820 830 728

MI-06' MIH-06 175 11625 _ 143 I 135_ 124 _ 117 803 _ N/A_20 830 856

MJ-07_ N/A _ _95 11 N/A | 160 1_]39, N/A 805 t N,A I 820 1 N,AI 98_

MI-08 I N/A 2275 N,,A / 186 / N'A I 162 N/A 803 N/A [ 82o / N'A _ _ ]2 MI-09 N'A 260 N,A I 211 I NIA ; 183 I N A 80 1 I N_A 82 0 N,A 12 40

Net I=B=R waterratingsbased on anallowanceof 1 15 L_I_I_!

ConsulI factory before s_]e_lng a boiler _or installations having unusual piping and pickup requlrement_ such as intermittent system operahon

e_.[enslv_ piping s_s[ems etc

3 Heatln9 Capacityand Annual FuelUbl_anon Efficiency(AFUE) rabngsarebasedon U S Governmenttest N[H ModelsAvailable asNaturalGaswn[hInlerm_ttenlIgmhonOnly

]3 ;;_ EPAIR_PABTS

REPAIR PARTS

SERIES MI/MIH GAS BOILER

Repair parts are available from your installer or by contacting Peerless Heater Company, Boyertown, PA 19512-1021. Use the figures and tables on pages 32-41 to assist in

ordering parts.

Note Remember to include boiler model number and serial number when ordenng parts

Figure 31: Base/Combustible Floor Pan

Table 9: Base/Combustible Floor Pan

] Base Assembly

2 Observation Cover Door 3 Base Blanket Seal

4 Combustible Floor Pan Assembly

Specify length

91518 51771 50867 90700

91883 91897

51771 51771 50867 50867 90701 90702

91909 93561 51771 51771 50867 50867

90703 90704

93573 81036 51771 81771 50867 50867 90705 90706

,,6) _\\

Figure 32: Manifold

Table 10: Manifold/Gas Train (MI - Standing Pilot)

Figure 33: Gas Valve and Pilot - Standing Pilot

(Continuous Ignition)

Steel Burner ! Specify quantity

• t

6 _Steel Burner w/Pilot Clip I per boiler 51263 51263

i _as Manifold - " -- i 50978 " 50979

8 _'_i Orifice Spud_48 i Natural Gas,O 2000 ft, : 50894 50894

o,ficespuZ_49

Orifice Spud, #56

_Or_f_ceSpud,#57

i elevation (specify qty)*

Natural Gas, 0-2000 ft.

elevation (specify q_)*

i LP Gasl 0;2000 _, 50899 50899 50899 : 50899

elevation (specify qty)

i LP Gas, 0-2000 ft.

! elevation (specify qty) i

9 Honeywell VR8200A2116 Gas Va]ve [ Nat. Gas

Honeywe!! VR820(_6040 Gas Valve LP Gas

] Honeywell VR8300A4003 Gas Valve Nat Gas

I Honeywell VR8300C4035 Gas Valve i LP Gas

I0 Honeywell Q314A3505 Pilot I Nat. Gas

HoneYwell Q314A3703 pi!ot . LP Gas

11 I HoneywellQ309A2119-24" Thin I

51263 51263 51263 50980 50981 0954 50955

50894 50894

i 50895 50895 50895

i 50900 50900_ s0900

50581 50581

5022ii50 21'

;0s87! 0587

91333 91333 91333 ' 91333

51688 51688 51688 51688 51688 51688

• ;

50555 50555 50555 i 50555 51318 51318 51318 i 51318

50581 50221

51688 50555 50555 50555 51318 ! 51318 ! 51318

*For elevations over 2,000 feet above sea level contact Peerless Heater Company.

Figure 34: Gas Valve and Pilot - Intermittent ignition

Table 11: Manifold/Gas Train (MI - Intermittent Ignition)

5 Steel Burner 6 Steel Burner w/Pilot Clip

7 Gas Manifold

8 Orifice Spud, #48

Speci_ quanfl_ 51537 51537 51537 51537 [ 51537 51537

lperbo er i 51539i5153951539i51539 51539!51539i 51539

:s097950980 s09 , 50956

Natural Gas, 0-2000 fi. 50894 50894 50894 50894 I

elevation (specify qty)*

Orifice Spud, #49 Natural Gas, 0 2000 ft. , i 50895--50895 50895

elevation (specify qty)* [ [

Orifice Spud, #56 LP Gas. 0-2000 ft. 50899 50899 50899 50899

elevation (specify qty)

Orifice Spud, #57 LP Gas, 0-2000 It. 50900 50900 50900

elevation (specify q_} i

9 Honeywell SV9501M2700 Gas Valve Natural Gas ! 51682 i 51682 51682 I

Honeywell SV9501M2064 Gas Valve LP Gas J 51691 51691 i 51691 i [ ] Honeywell SV9601M4167 Gas Valve i Natura! Gas _ ] 1

Honeywell SV9601M4225 Gas Valve• Lp Gas _ L : _6!!_692

I0 Honeywell Q3480B1025 Pilot Natural Gas ! 5168451684 51_ ;51684 516_ 51684 !51684

Honeywell Q3480B1033 Pilot i LPGas I 51685 81685 51685 51685 51685 ] 51685 ] 51685

*For elevations over 2,000 feet above sea level contact Peerless Heater Company•

Table 12: Manifold/Gas Train (MIH - intermittent ignition)

7 8

Steel Burner Steel Burner w/Pilot Clip

Gas Manifold

Orifice Spud, #49

Honeywell SV9501M2700 Gas Valve Natural Gas Honeywell SV9601M4167 Gas Valve Natural Gas Honeywell Q3480BI025 Pilot Natural Gas

Specify quantily 51537 51537

1 per boiler 51539 51539 51539

5097850979 ] 50980 [ S098i

Natural Gas, 0-2000 fi. 50895 I 50895 50895 i 50895

elevation (specify qty)* i

51682 51682 51682 !

51683

, 51684 i 51684 51684 ] 51684

*For elevations over 2,000 feet above sea level contact Peerless Heater Company,

Figure 35: Block/Draft Hood

Table 13A: Block/Draft Hood

12 Block Assembly 13 Flue CollecloriDraft Hood

Flue CollectorlDraft Hood

14 _ Flue Collector Blanket Seal Specify length

Table 13B: Flue Baffles for MIH Only

50866

91280

90511 50866

15 Flue Baffle - 4"

Flue Baffle - 8"

1 per flue (specify qty) 1 per flue (specify qty)

51583

Figure 36: Jacket

Table 14: Jacket

16 ,Jacket Assembly

*Complete Jacket Consists of:

]6A Left Side Panel 16B Right Side Panel

16C Rear Panel 16D Top Panel

16E Inner Front Panel 16F Baffle Panel

16G Removable Front Panel 16H Upper Front Panel

Complete jacket* with insulation and screws

90445 90446 90447 90448 90449 90450 90451

I_t"-Jl_I_1;t I=a_l_-']

Figure 37: Controls/Circulator/Vent Damper

Table 15: Controls/Circulator/Vent Damper

17 Circulator w/Flanges. Gaskets and Hardware* 18 1%" x 2_//' Nipple*

19 1%" Tee*

20 11/4" x 4" Nipple*

21 IV4" x 3/4"Bushing* 22 3/4"Drain Valve*

23 Honeywell L8148E1182 Limit w/%" Well* 24 Temperature-Pressure Gauge

25 ! Safety Relief Valve, 30 psi*. Conbraco 10-408 05

Safety Relief Valve, 50 psi*, Watts #350 26 Flame Roll-Out Safety Shut Off Switch 27 Blocked Vent Shut Off (Spill) Switch 28 Vent Damper

*Available from distributor

50736 99236

425

99967

1539 50517 51689

51774 50501

99950 51587 51590 90608

50736 50736

99236 99236

425 425

99967 99967

1539 1539

50517 50517 51689 51689

51774 51774 50501 50501 99950 99950 51587 51587 51590 51590 90608 90609

50736 50736 99236 99236

425 425

99967 99967

1539 1539 50517 50517 51689 51689 51774 51774 50501 50501 99950 99950 51587 51587 51590 51590

90609 90610

50736 50735 99236 99236

425 425

99967 99967

1539 1539 50517 50517 51689 51689 51774 51774 50501 50501 99950 99950 51587 51587

51590 51590 90611 90611

Series MI/MIH

Gas

Boilers

Installation,

Operation

Maintenance Manual

TO THE INSTALLER:

This manual is the property of the owner and must

be affixed near the boiler for future reference.

TO THE OWNER:

This boiler should be inspected annually by a

Qualified Service Agency.

HI Division ASME

of gama

PEr-I_LESS ®

CAST IRON BOILERS

PEERLESS HEATER COMPANY

231 NORTH WALNUT STREET • BOYERTOWN, PA 19512-1021 • PHONE 61_367-2153

vvww.peerless-heater.com

THE PREFERRED HEATING CHOICE

@2002 Peerless Heater Company MI8038 R5 (12/02-10M)

Printed in U.S.A.

PEERLESS MI SERIES, MIH SERIES, MI-03, MI-04, MI-05 Installation, Operation & Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual