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
...
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
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
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
Loading...