Slant/Fin EH-M2 Operation And Installation Instructions Manual page 6

6 EH-M2-40 Boiler Operation and Installation Instructions
Table 1. Lug Sizes
Model
EH-40-M2
EH-8-M2 thru 32-M2
EH-12-M2 thru 40-M2
The neutral tap is for the circulator and control transformer.
† Aluminum conductors may be used, lug size, conduit size, ampacity and all applicable codes permit-
ting. However, aluminum conductors may not be used for models over 32kw.
Table 2. Flow Switch Size Selection
Model
EH-40-M2
EH-8-M2 thru 32-M2
** Straight pipe upstream and downstream.
Table 3. Current Ratings
SINGLE PHASE 3 WIRE, 120/208V ‡
Basic Model Heater Amperes
No. @ 208V
EH8-13-5-M2
EH10-13-5-M2
EH12-13-5-M2
EH16-13-5-M2
EH20-13-5-M2
EH24-13-5-M2
EH28-13-5-M2
EH32-13-5-M2
EH40-13-5-M2
THREE PHASE 4 WIRE, 120/208V
WYE CIRCUIT ONLY ‡
Basic Model Heater Amperes †
No. @ 208V
–
–
EH12-34-5-M2
EH16-34-5-M2
EH20-34-5-M2
EH24-34-5-M2
EH28-34-5-M2
EH32-34-5-M2
EH40-34-5-M2
† Leg with the highest value of line current of an unbalanced 3-phase load.
‡ 125 VAC maximum rating of all hot conductors.
Distribution Ground Lug
Phase Block Wire Size Wire Size
CU
1 2-3/0 MCM CU
1 6-2/0
3 6-2/0
Flow Switch
Pipe
McDonnell
Size
& Miller No.
FS8W 1-1/4"
FS4-3T3-1 1"
SINGLE PHASE 3 WIRE, 120/240V ‡
Basic Model
No.
29 EH8-13-5-M2
36 EH10-13-5-M2
43.4 EH12-13-5-M2
58 EH16-13-5-M2
72 EH20-13-5-M2
87 EH24-13-5-M2
101 EH28-13-5-M2
116 EH32-13-5-M2
145 EH40-13-5-M2
THREE PHASE 4 WIRE, 120/240V
DELTA CIRCUIT ONLY ‡
Basic Model
No.
– –
– –
43 EH12-34-5-M2
58 † EH16-34-5-M2
72 † EH20-34-5-M2
69 † EH24-34-5-M2
69 † EH28-34-5-M2
83 † EH32-34-5-M2
108 † EH40-34-5-M2
Neutral Din
Rail Mount
CU CU
6-2/0 14 Min.
6-2/0 14 Min.
6-2/0 14 Min.
Pipe Length
of Flow
Switch**
8-1/2"
6-1/2"
Heater Amperes
@ 240V
33
42
50
67
83
100
117
133
167
Heater Amperes †
@ 240V
–
–
50
67 †
83 †
79 †
79 †
96 †
125 †