Slant/Fin EH-08-135-S2, EH-40-345-S2, EH-12-345-S2, EH-40-135-S2, EH-12-135-S2 Operation And Installation Instructions Manual
...Page 1
MODEL EH ELECTRIC BOILER
EH-08-135LB through EH-40-135LB, single phase, 3 wire, 120/208V, 120/240V
EH-12-345LB through EH-40-345LB, three phase WYE, 4 wire 120/208V
OPERATION AND INSTALLATION INSTRUCTIONS
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAGE
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Air Eliminator and Expansion Tanks . . . . . . . . . . . . . . . . . .2
Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Wall Thermostat Flow Switch and Circulator . . . . . . . . . . .2
Typical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Rough-in Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Electrical Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Typical Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Typical Zone Valve Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Fill System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Air Elimination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Bypass Flow Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .7
Check for Proper Boiler and System Operation . . . . . . . . .7
Operation (models equipped with seq. control system) . . . . . . .7
Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Appendix A, B, C & D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
IMPORTANT:
This manual must be left with owner and should be hung
on or adjacent to the boiler for reference.
Wiring diagram located on inside front panel.
LB
Heating Contractor
Address
Phone Number
Boiler Model Number
Boiler Serial Number
Installation Date
Part # 790921000 • Publication EH-40-LB • Printed in U.S.A. 615
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 1
Page 2
Monitron LB Boiler Operation and Installation Instructions
DESCRIPTION
The Monitron boiler is a low pressure hot water heating electric boiler.
The heating elements are sheathed resistance type. The heat exchanger
is cast-iron. The heat exchanger is constructed, inspected, and stamped
in accordance with Section IV of the American Society of Mechanical
Engineers (ASME) Boiler and Pressure Vessel Code. In addition, the
Monitron Boiler is equipped with a safety relief valve, operating control
and two high limit controls.
MOUNTING
The Monitron is intended for wall mounting, utilizing the wall brackets
attached to the boiler (see Figure 1). Allow sufficient space for piping
and service. The boiler may be installed in an enclosed space (see
Figure 1). The boiler must be INSTALLED LEVEL
.
PIPING
Air Separator and Expansion Tanks
The recommended piping arrangement is shown in figures 3 through 5.
Note that there is a built-in air eliminator in the heat exchanger (air vent,
however, is by others). The air vent tapping is 13mm (1/2”). A bushing
(by others) to suit the size of the air vent thread is required. Additional air
vents should be installed at points just upstream from all drops in elevation of the piping system (high points).
Relief Valve Discharge Piping
Use same size or larger piping than valve outlet. Must terminate 152mm
( 6”) minimum from floor with a plain ( no threads) end. Place a bucket
under pressure relief valve discharge. Make sure discharge is always visible. DO NOT hard-pipe to drain piping.
Flow Switch
THE INSTALLATION OF A FLOW SWITCH IS STRONGLY
RECOM MENDED. It is intended to prevent the burnout of heater elements should the circulator fail, or should air accumulate in the boiler
due to faulty air elimination (see Table 3 for flow switch size required).
FLOW SWITCH MUST BE INSTALLED IN HORIZONTAL POSITION.
IF A FLOW SWITCH IS NOT USED JUMPER THE “FF” TERMINALS
(JUMPER NOT SUPPLIED.)
Bypass
The bypass shown must be set so that a sufficient amount of water can
circulate through the boiler when all zone valves are closed. (See Figure
4) A bypass is mandatory on a constant circulation system using zone
valves if a wild loop is not part of the system. The bypass line will prevent
circulator damage caused by a circulator running up on head.
Multi-zone Balancing
Raise all zone thermostat settings and verify that all zone valves are
open (bypass valve should be closed). Close all electrical panels. Turn
on 15 amp control circuit breaker ONLY. Pump
should operate. Note the pressure reading on the pump discharge.
Lower each zone thermostat setting to close corresponding zone valve.
Adjust the corresponding balancing valve to maintain pump discharge
pressure. The pump discharge pressure should remain the same when
all zones are in bypass or when all zones are open or any combination
of opened and closed. (See Figure 4 & 5.)
WIRING
To wire the electric boiler, perform the following procedures:
1. Wall Thermostat Flow Switch and Circulator
All circuit breakers ahead of boiler must be OFF. Remove the Control
Panel (left-hand front cover) by removing 5 screws from top, bottom and
side flanges. The centre compartment contains a 24V control terminal
board marked, "FF/TT/ (see figure 2 ) Wire a 24V, two-wire heating thermostat or the auxiliary end switch terminals from zone valves (see Figure
7) to "TT". The "FF" terminals are for a flow switch. Refer to "Bypass Flow
Adjustment" (page 7) for wiring and adjustment procedures.
The left compartment contains a 120V terminal board marked "AB/Circulator". Wire the circulator and connect wires and conduit through
the 13 mm (1/2") knockout (pro vided on the bottom left hand corner of
the cabinet) to the terminal board "Circulator" terminals. These terminals
supply 120 volts to the circulator only when there is a call for heat.
Wire an external zone valve transformer to the "A-B" terminals if zone
valves are used. These terminals provide a constant 120 volts and can
alternately be used to power the circulator if constant circulation is desirable. Use 90°C (75°F) minimum wire, copper or aluminum.
2. Service Connections and Electrical Ratings
A. All circuit breakers ahead of boiler must be OFF. Remove the
Service Connection Panel (right hand front) cover by removing 5
screws from the top, bottom and side flanges (see wiring diagram
on back of the Service Connection Panel and Figure 2).
B. Draw power feeder cable 75°C minimum) and conduit through
service K.O. provided on side, topvor bottom.
C. Connect hot lines to main lugs provided in service compartment.
A ground lead should be drawn and wired to the ground lug in the
service compartment. If rating plate indicates boiler is a single
phase 3-wire or 3-phase 4-wire model, draw a neutral wire #12
AWG maximum, 75°C minimum and connect to neutral lug
provided in service compartment. See Tables 1 and 2 for lug
sizes and current ratings.
2
Figure 2. Typical Wiring Diagram for Models equipped with
Circuit Breakers.
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 2
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3
Monitron LB Boiler Operation and Installation Instructions
BOILER MUST BE LEVEL
14 [356]
MINIMUM
16 [406]
10 5/16 [262]
3 7/16 [87]
2 13/16
[71]
2 1/2
[64]
&
1 3/8
[35]
KNOCK
-OUTS
4 19/32 [117]
TOP
VIEW
BOTTOM
VIEW
RIGHT SIDE
VIEW
2 [51]
KNOCK
-OUT
6 29/32
[175]
9 29/32
[252]
8 9/16
[217]
2 9/16 [65]
5 9/16 [141]
8 9/16 [217]
1 3/4 [44]
RELIEF
VALVE
1 3/4 [44]
1/2" PLUG
2 1/2 [64] & 1 3/8
KNOCKOUTS
2 [51]
KNOCKOUT
13/16 [21]
2 5/16 [59]
1 [25]
2 9/16 [65]
5 9/16 [141]
8 9/16
[217]
3 7/16
[87]
9 1/4
[235]
2 3/16 [56]
(1 1/4 RETURN)
2 1/2 [64] & 1 3/8
KNOCKOUTS
2 [51] KNOCKOUT
12 [305]
MINI
-MUM
8 [203]
MINIMUM
16 [406]
25 21/32 [652]
18 11/16
[475]
16 [406]
MINIMUM
REQUIRED FOR
REPLACING
ELEMENTS
2 1/8 [54]
(1 1/4
SUPPLY)
WALL
WALL
WALL
MONITRON "ROUGH-IN" DIMENSIONS
12 [305]
MINIMUM
16 11/16
[424]
3 [76]
5 3/8 [136]
7/8 [22] (3 PLACES)
1. UNIT MAY BE FULLY ENCLOSED IF CLEARANCE
DIMENSIONS ARE RESPECTED.
2. DUAL DIMENSIONS ARE INCH [MM]
1 5/16
[33]
1 27/32 [47]
1/8 [3]
3 7/16 [87]
Figure 1
10 1/2 [267]
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 3
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4
Monitron LB Boiler Operation and Installation Instructions
Main Lug Grounding
Wire Size Lug
Model Phase CU-AL† Wire Size
EH-35-40LB 1 350-6 Cu/AI 6-2/0
EH-8-32LB 1 2/0-14 Cu 6-2/0
EH-12-40LB 3 2/0-14 Cu 6-2/0
Neutral Lug Wire Size: 2/0-6
Table 1. Lug Sizes
† ALUMINUM conductors may be used, lug size, conduit size, ampacity and all
applicable codes permitting. However, aluminum conductors may NOT be
used for models over 32 Kw.
Table 2. Current Ratings
* For current values @ 208V, multiply current @ 240V by 0.867.
† Leg with the highest value of line current of an unbalanced 3-phase load.
‡ 125 VAC maximum rating of all hot conductors.
Table 3. Flow Switch Size Selection
* Both upstream and downstream of flow switch.
Model
No.
Flow Switch
McDonnell &
Miller No.
Pipe Size
Minimum
Length of
Straight Pipe*
mm inch mm inch
EH-40 FS8V 32 1-1/4 216 8-1/2
EH-8 thru
EH-35
FS4-3T3-1 25 1 165 6-1/2
SINGLE PHASE 3 WIRE
120/208V, 120/240V‡
THREE PHASE, 4 WIRE
120/208V-WYE
CIRCUIT ONLY‡
Basic
Model
No.
Heater
Ampres*
@240V
FLA
@240V
Basic
Model
No.
Heater
Ampres†
@208V
FLA
@208V
EH-8 33 45
EH-9 38 49
EH-10 42 54
EH-12 50 62 EH-12 29† 41†
EH-15 63 74 EH-15 36† 48†
EH-16 67 79 EH-16 43† 55†
EH-18 75 87 EH-18 51† 63†
EH-20 83 95 EH-20 54† 66†
EH-24 100 112 EH-24 69† 69†
EH-25 104 116 EH-25 72† 72†
EH-28 117 129 EH-28 69† 81†
EH-30 125 137 EH-30 72† 84†
EH-32 133 145 EH-32 83† 83†
EH-35 146 158 EH-35 90† 90†
EH-38 158 170 – – –
EH-40 167 179 EH-40 108† 108†
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 4
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Monitron LB Boiler Operation and Installation Instructions
NOTES:
1. Optional blocking gate valve and hose end valve used (with drain valve) for fast fill and purge of system.
IMPORTANT: Close bypass line valve (if used) during purging.
2. Circulator should not be installed at lowest point of piping.
3. There should be no elbows, tees, or change of pipe size for at least 5 diameters of pipe size (see Table 3) upstream and downstream of flow switch.
Flow switch should always be mounted in the horizontal position. See Table 3.
Figure 3. Typical Single Zone Piping
Figure 4. Typical Multi-Zone using 2-Way Valves
Figure 5. Typical Multi-Zone Using 3-Way Valves
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 5
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6
Monitron LB Boiler Operation and Installation Instructions
5
LOW
VOLTAGE
(24 V)
TERMINAL
BLOCK
LINE VOLTAGE (120V)
TERMINAL “B” LOCK
FOR OUTDOOR
THERMOSTAT IF
USED OR JUMPERED
IF NOT.
2
1
T T
BOILER
A
B
MULTIZONING OF BOILER;
PUMP ZONING SYSTEM USING R845A RELAY
Figure 6. Typical Zoning Valve Wiring
Figure 7. Multi-Zoning of boiler; pump zoning system using R845A relay.
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 6
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7
Monitron LB Boiler Operation and Installation Instructions
START-UP
NOTE: Make sure that all circuit breakers ahead of boiler are OFF.
Fill System
See Figures 3 through 5 for suggested purge valve and blocking
valve. If system is filled but not purged, radiators must be
vented individually, to prevent air blocking of water flow. Fill
approximately 83 kPa (12 psi) (cold water), whether automatic
or manual fill is used. Do not apply full line pressure to system;
boiler and relief valve are rated at 207 or 345 kPa (30 or 50 psi)
(see rating plate). Suddenly applied main pressure can exceed
690 kPa (100 psi).
WATER CONTENT OF BOILER
All models EH-8 through EH-40 14.2 litres (3.75 U.S. Gallons)
Air Elimination
Diaphragm tank and air vent valve are recommended, see
Figures 3 through 5. Air remaining in system will vent from the
automatic vent valve during system operation. Valve cap must
be loose or removed to allow automatic venting. Open relief
valve briefly after filling to pressure, to make sure boiler is free
of air.
Bypass flow adjustment - LB Models (Figure 4)
Shut OFF ALL circuit breakers ahead a boiler. Turn down all
zone thermostats. Inspect all zone valves to be sure all are
closed. Connect flow switch wires to flow switch common and
N.C. terminals and to the “FF” terminals in the boiler. Fully open
bypass valve. Remove end switch wiring from TT terminals. Put
a jumper on TT terminals. Close ALL front panel covers. Turn on
circuit breakers for boiler. Slowly close bypass valve until the element contactors open. Immediately open the bypass slightly until
the first contactor pulls in again. Flow switch now has closed
contacts, indicating required minimal bypass flow rate when piping circuits or shut off. Bypass valve should be locked at this
position. SHUT OFF ALL circuit breakers ahead of boiler and
open CONTROL PANEL (left hand FRONT COVER). Remove
jumper on “TT” terminals. Connect zone valve end switches (in
parallel) to thermostat “TT” terminals. See figure 7 and wiring
diagram on boiler. Replace CONTROL PANEL COVER.
Check for Proper Boiler and System Operation
To check for proper boiler and system operation, perform the
following procedures:
1. Open boiler water supply valve. Boiler will not operate
properly for approximately 15 minutes, until air is purged
from water lines.
2. Check aquastat settings. The aquastat is located under
the left side control cover.
3. Turn up all room thermostats.
4. There will be a delay of up to five minutes before all
circuits are energized.
5. Current may be checked by a qualified electrician at the
feeder panel and compared to the values shown in
Table 2.
6. Water flow through the boiler should be sufficient to keep
the flow switch closed. The two limit switches should
remain closed.
OPERATION
IMPORTANT:
DO NOT operate boiler until the following criteria have
been met:
1. Must be installed by qualified heating and electrical
contractors in accordance with instructions in this
manual.
2. Must be installed in compliance with local codes.
3. Must be inspected and approved by installing contractors and any local authority having jurisdiction, and be
approved for operation by them.
• Ask the installer to explain operation of the entire heating
system.
• Turn on all circuit breakers for boiler and circulator.
• Adjust wall thermostat to required temperature. If room
temperature is lower than the thermostat setting, the first
heater stage will go on immediately and the balance of the
heater stages will go on one at a time with a
delay of between several seconds and 1-1/2 minutes
between stages.
• In mild weather you may wish to reduce the total output of
heat. You may do this by turning off one or more of the
circuit breakers on the boiler. Do not turn off the 15 AMP
control circuit breaker.
PERIODIC INSPECTION
The hot water system, which includes the Monitron boiler, the
radiators and water control devices, should remain filled with
water at all times. DO NOT drain except to make repairs or to
prevent freeze-up during extended cold weather shutdown.
The pressure/temperature gauge on the Monitron should be
checked frequently: at the highest operating temperature,
pressure should be the same throughout the heating season.
If pressure (at a constant temperature) consistently rises or
falls over a period of time, a fill valve leak, a system leak or
compression tank malfunction is indicated. Leaks anywhere
in the system must be repaired without delay. Regular addition of fresh water to replenish leaks adds oxygen and lime.
Oxygen corrosion will cause further leaks and parts failure,
lime buildup on heating elements will cause element failure
due to overheating. If any leaks are found, or if pressure
changes, call for service immediately.
IMPORTANT
Under no circumstances should any electrical wiring or
internal controls be touched, except by an authorized
electrician (wiring and controls) or heating system service expert (system service, repair, shutdown). Any
mechanical adjustments to the heating equipment and
system must be made by a qualified heating
serviceperson.
CAUTION: The aquastat control has line voltage in it.
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 7
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Appendix A
Thermostat Heat Anticipator Settings
Fixed anticipator thermostats are not adjustable. Adjustable anticipator thermostats, depending on thermostat model, may be adjustable
from a . 18 to a .9 setting by moving a pointer on the anticipator.
The higher the anticipator setting (towards .9) the longer it will take for the thermostat to respond to a change in room temperature. Too
high a setting and the boiler will be slow to respond to a temperature change in the room. This can cause the room temperature to drop to
an uncomfortable level before the boiler starts. This may generate homeowner complaints.
The lower the anticipator setting (toward .18) the faster the thermostat will respond to a change in room temperature. Too low a setting and
the boiler will short cycle. Boiler short cycling will cause unnecessary wear on the equipment and in the case of oil boilers it can lead to
poor combustion and more frequent cleaning of the combustion area.
It is important to understand what the thermostat is controlling and then determine the amp rating of that relay, gas valve, zone valve or
control. This information is usually stamped somewhere on the component. A properly set anticipator will allow the system to operate at its
maximum effectiveness.
Appendix B
Accumulation of foreign deposits in heat exchanger
Recent investigations of boilers which were installed in hard water areas, revealed that mineral deposits had accumulated in the heat
exchanger. In addition, sludge, scale and other solid contaminants were present in boilers installed in older systems or where the water
was supplied from a well. This accumulation creates an insulating layer that drastically may affect boiler efficiency.
THE TERMS OF THE BOILER WARRANTY WILL NOT APPLY TO FAILURES ENCOUNTERED UNDER THESE CIRCUMSTANCES.
RECOMMENDATIONS:
On all installations in hard water areas:
1. The system should be thoroughly inspected for leaks which must be repaired
however minor they may be.
2. The initial water charge of the system must be treated to reduce its hardness
to an acceptable level.
In addition to the aforementioned, older systems and those supplied from wells may require that a filter or strainer be incorporated in the
circuit at some point on the return line closest to the boiler. Suitable water treatment filters are commercially available for this purpose.
WE STRONGLY RECOMMEND THAT YOU CONVEY THIS VITAL INFORMATION TO ALL PARTIES CONCERNED.
Water Treatment
A good water treatment program will not only extend the useful life of this boiler but it will also save much of the time and expense of
repairs made necessary by preventable occurrences. A reputable water treatment company should be consulted to evaluate and determine
the best overall treatment program for your boiler equipment.
Appendix C
Replacement of Electric Heaters and gaskets
When replacing heating elements replace the gasket at the same time. It is not recommended to re-use an old gasket as it may have
become damaged or brittle. To prevent binding and leaks when installing a new gasket wet the gasket with water or coat it with talcum
powder to allow it to move into position properly without binding.
Appendix D
Use of Non-oxygen Diffusion Barrier Underfloor Tubing
The boiler warrenty does not cover leaks resulting from corrosion caused by the use of underfloor plastic tubing without an oxygen diffusion
barrier. Systems must have the non-oxygen diffusion barrier tubing separated from the boiler with a heat exchanger. Slant/Fin recommends
the use of underfloor plastic tubing with an oxygen diffusion barrier. Other systems components may also require protection from oxygen
permeation.
©2015 Slant/Fin Corp. Publication EH-40-LB Printed in U.S.A. 615
U.S.A.
Slant/Fin Corporation • 100 Forest Drive
Greenvale, NY 11548 • 516-484-2600
www.slantfin.com
Canada
Slant/Fin LTD/LTEE • 400 Ambassador Drive,
Mississauga, Ontario L5T 2J3 • 905-677-8400
www.slantfin.ca
EH-40-LB_515_EH-40 8/14/15 3:05 PM Page 8
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