Slant/Fin EH-M2 User Manual
MODEL EH-M2 ELECTRIC BOILER
Four stage electronic control with energy saving and other features.
EH-08-138-M2 through EH-40-138-M2, single phase, 3 wire, 120/208V
EH-08-134-M2 through EH-40-134-M2, single phase, 3 wire, 120/240V
EH-12-348-M2 through EH-40-348-M2, three phase, 4 wire, 120/208V
EH-12-344-M2 through EH-40-344-M2, three phase, 4 wire, 120/240V
OPERATION AND INSTALLATION INSTRUCTIONS
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAGE
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
“Rough-In Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 & 5
Air Eliminator and Expansion Tanks . . . . . . . . . . . . . . . . . . . . . .4
Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Wiring (Warning: DO NOT turn on breakers on unit) . . . . . . . . .4
Wall Thermostat Flow Switch and Circulator . . . . . . . . . . . . . . .4
Service Connections and Electrical Ratings . . . . . . . . . . . .4 & 6
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Fill System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Air Elimination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Bypass FlowAdjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Check for Proper Boiler and System Operation . . . . . . . . . . . . .7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Appendix A, B, C & D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
IMPORTANT:
This manual must be left with owner and should be hung
on or adjacent to the boiler for reference.
MONITRON II
LISTED
89C4
Publication No. EH-M2-40 Rev D • Printed in U.S.A. 1014
Part No. 792860000
Heating Contractor
Address
Phone Number
Model Number
Serial Number
Installation Date
2 EH-M2-40 Boiler Operation and Installation Instructions
DESCRIPTION
The Monitron II boiler is a low pressure hot water heating electric
boiler. The control is a 4 stage electronic control with energy
saving and other features. 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 II Boiler is equipped with a safety relief valve conforming
to ASME requirements and two separate limit controls conforming
to U.L. requirements. The Monitron II boiler is Underwriters'
Laboratories, Inc. listed.
MOUNTING THE BOILER ON A WALL
Be sure that the wall is vertically plumb and capable of carrying the
weight of the boiler and the system piping, when full of water. The
boiler full of water is approximately 45kg (100 lbs). Add to this the
weight of the system piping that the boiler will be supporting.
Be sure that there are studs available in the proper locations, for
securing the boiler wall bracket and back panel.
(See Figures 1 and 1a).
For wood stud walls, use lag screws or wood screws with a coarse
thread and a minimum of 76mm (3”) in length.
For metal stud walls, use toggle-style bolts that are specifically
designed for such and maximum capacity exceeds the weight of the
boiler and the system piping when full of water.
DO NOT use anchors driven into sheetrock to hold the boiler up on
the wall. If mounting the boiler on a cement wall, use anchors that
are specifically designed for such, and maximum capacity exceeds
the weight of the boiler and the system piping, when full of water.
A. INSTALL THE WALL BRACKET. SEE FIGURE 1A.
1. Remove the wall bracket from the wood packing, by unfastening
the two screws that holds it in place, for shipping purposes only.
2. Select the location on the wall where the boiler will be mounted.
The upward facing tabs of the wall bracket will align with the top
surface of the boiler jacket.
3. For sheetrock and stud construction, locate the studs and
determine which set of holes in the wall bracket best align
with the center of the studs. For cement walls, determine a
location for the wall bracket to mount where the anchors will
be secure, devoid of seams or cracks.
4. Place the bracket in the selected location, with the 2 tabs
positioned up and facing outward, level it out, and mark the
holes to be used. A minimum of 4 of these holes must be
utilized, regardless of wall material.
5. Drill the appropriate diameter and depth holes for the
fasteners used in the wall, where marked.
6. Fasten the wall bracket to the wall, being sure that the tabs
face upward and outward, and the fasteners have engaged
the wall properly.
B. INSTALL THE BOILER ON THE WALL. SEE FIGURE 1.
1. Lift the boiler up against the wall, with the top edge of the jacket
slightly above the wall bracket tabs. Engage the boiler jacket near
top lip notches properly.
2. There are fastener holes in the lower area of the boiler rear
panel to ensure that the boiler does not move off the wall bracket.
Mark these 2 holes, with the boiler in place, then lift the boiler off
the wall bracket.
3. Determine which fastener type will best engage with the wall construction at the location of the 2 marked holes. Drill out the appropriate diameter and depth holes for the fasteners, where marked.
4. Lift the boiler up onto the wall bracket again, as described in
Step 1. Secure the boiler to the wall, with the 2 fasteners in the
lower rear panel area.
EH-M2-40 Boiler Operation and Installation Instructions 3
Figure 1
MONITRON II "ROUGH-IN" DIMENSIONS
NOTES:
1. UNIT MAY BE FULLY ENCLOSED IF
CLEARANCE DIMENSIONS ARE RESPECTED.
2. DUAL DIMENSIONS ARE: INCH [MM]
1 27/32 [47]
9/32 [7]
ø
2 1/2 [64] &
ø
1 3/8 [35]
KNOCKOUTS
WALL
TOP
VIEW
ø
1 3/4 [44] (1/2 PLUG)
ø
2 [51] KNOCK-OUT
5 9/16 [141]
4 19/32
[117]
ø
1 3/4 [44]
(RELIEF VALVE)
8 23/32 [222]
3 19/32 [92]
2 9/16 [65]
Figure 1a
STUDS
FACE TABS UP AND
FORWARD. INSTALL
TABS LEVEL
SECURE WALL
BRACKET INTO STUDS
WITH APPROPRIATE FASTENERS
WALL
MINIMUM (REQUIRED FOR
REPLACING ELEMENTS)
16 11/16
[424]
3 [76]
4 3/4 [121]
BOTTOM
VIEW
9 13/32
[239]
2 5/16 [59]
13/16 [21]
3 19/32
[92]
25 11/16 [652]16 [406]
BOILER MUST BE LEVEL
1 [25] TYP
16 [406]
7 15/16 [202]
1 3/4 [44]
1 3/4 [44]
ø
7/8 [22]
5 PLACES
ø
2 [51] KNOCKOUT
12
[305]
MINIMUM
8
[203]
MIN-
IMUM
14
[356]
MINIMUM
5 9/16 [141]
2 9/16 [65]
8 23/32
[222]
12
[305]
MINIMUM
2 25/32
[70]
ø
2 1/2
[64]
ø
1 3/8
&
[35]
KNOCK-
OUTS
9 29/32
[252]
6 29/32
[175]
BOILER HEIGHT ABOVE
WALL BRACKET TAB
10 11/16
[272]
3 19/32
[92]
ø
2 [51]
KNOCKOUT
RIGHT SIDE VIEW
1/4
[7]
WALL
ø
2 1/8
[54]
(1 1/4
SUPPLY)
8 23/32
[222]
6 15/16 [177]
ø
2 1/2 [64] & ø 1 3/8
KNOCKOUTS
ø
2 3/16 [56](1 1/4 RETURN)
WALL
4 EH-M2-40 Boiler Operation and Installation Instructions
Table 1. Lug Sizes
Table 3. Current Ratings
Table 2. Flow Switch Size Selection
† Leg with the highest value of line current of an unbalanced 3-phase load.
‡ 125 VAC maximum rating of all hot conductors.
PIPING
Air Separator and Expansion Tanks
The recommended piping arrangement is shown in figures 2
through 4. 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 piping. Must terminate
152mm ( 6”) minimum from floor with a plain ( no threads) end.
Place a bucket under pressure relief valve discharge piping. 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 heat er elements should the circulator fail, or should air accumulate
in the boiler due to faulty air elimination (see Table 2 for flow
switch size required). FLOW SWITCH MUST BE IN STALLED 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 3.)
Multi-zone Balancing
Raise all zone thermostat settings and verify that all zone valves are
open (not bypassed). Close all electrical panels. Turn on 10 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 3 & 4.
WIRING
To wire the electric boiler, perform the following procedures:
1. Wall Thermostat Flow Switch and Circulator
• All circuit breakers ahead of and at boiler must be OFF. Remove the
Control Panel (left-hand front) Cover by removing 5 screws from top,
bottom and side flanges.
• The right-hand compartment under the Control Panel Cover contains
a terminal board marked, (SLANT/FIN "INTERFACE BOARD"). Wire a
2-wire 24V room heating thermostat or the auxiliary end switch terminals of zone valves (see Figure 5) to terminals 3 and 4 at this time.
The 1 and 2 terminals are for the flow switch. The flow switch circuit is
a low voltage circuit.
• Wire the circulator and connect 115V wires and conduit through 13
mm (1/2") K.O. provided on bottom left hand corner, to the "INTERFACE BOARD" at terminals "L" and "N", where it is marked "CIRC.
PUMP".
2. Service Connections and Electrical Ratings
A. All circuit breakers ahead of and at 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 5).
Model
Phase
Distribution
Block Wire Size
CU
Ground Lug
Wire Size
CU
Neutral Din
Rail Mount
CU
EH-40-M2
EH-8-M2 thru 32-M2
EH-12-M2 thru 40-M2
1
1
3
2-3/0 MCM CU
6-2/0
6-2/0
6-2/0
6-2/0
6-2/0
14 Min.
14 Min.
14 Min.
The neutral tap is for the circulator and control transformer.
† 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 32kw.
Model
Flow Switch
McDonnell
& Miller No.
Pipe
Size
Pipe Length
of Flow
Switch**
EH-40-M2
EH-8-M2 thru 32-M2
FS8W
FS4-3T3-1
1-1/4"
1"
8-1/2"
6-1/2"
SINGLE PHASE 3 WIRE, 120/208V
‡
Basic Model
No.
Heater Amperes
@ 208V
EH8-13-8-M2
EH10-13-8-M2
EH12-13-8-M2
EH16-13-8-M2
EH20-13-8-M2
EH24-13-8-M2
EH28-13-8-M2
EH32-13-8-M2*
EH40-13-8-M2
29
36
43.4
58
72
87
101
116
145
SINGLE PHASE 3 WIRE, 120/240V
‡
Basic Model
No.
Heater Amperes
@ 240V
EH8-13-4-M2
EH10-13-4-M2
EH12-13-4-M2
EH16-13-4-M2
EH20-13-4-M2
EH24-13-4-M2
EH28-13-4-M2*
EH32-13-4-M2*
EH40-13-4-M2
33
42
50
67
83
100
117
133
167
THREE PHASE 4 WIRE, 120/208V
WYE CIRCUIT ONLY
‡
Basic Model
No.
Heater Amperes †
@ 208V
–
–
EH12-34-8-M2
EH16-34-8-M2
EH20-34-8-M2
EH24-34-8-M2
EH28-34-8-M2
EH32-34-8-M2
EH40-34-8-M2
–
–
43
58 †
72 †
69 †
69 †
83 †
108 †
THREE PHASE 4 WIRE, 120/240V
DELTA CIRCUIT ONLY
‡
Basic Model
No.
Heater Amperes †
@ 240V
–
–
EH12-34-4-M2
EH16-34-4-M2
EH20-34-4-M2
EH24-34-4-M2
EH28-34-4-M2
EH32-34-4-M2
EH40-34-4-M2*
–
–
50
67 †
83 †
79 †
79 †
96 †
125 †
** Straight pipe upstream and downstream.
Loading...