Transformer Selection Guide
The transformer’s primary voltage must be compatible with the boiler power voltage. Transformer sec-ondary voltage must be 120 VAC (220 VAC for export).
To select transformer size find the sum of all component VA requirement, i.e. ES-72 with ES38083V condensate return system and ES81600 automatic blowdown system requires:
Basic Boiler 1/4 VA
ES 38083V 3/4 VA
ES 81600 1/2 VA
Transformer VA Required 1 1/2 KVA
| Basic Boiler | Transformer Size(kVA) |
|---|---|
|
SSB, ES 12-72 ES 85-180 |
1/4 1/2 |
|
SVS 150-180 SVS 494-630 SVS 720-1620 |
1/2 3/4 1 |
*Refer to following table to compensate for additional loading due to specific options
| Option | Additional (kVA) Required |
|---|---|
|
Water Feeds ES99117, SSB99117 SV99117 |
- 1/4 |
| ES38002, SSB38002A | 1/4 |
| ES38020A | 1 |
| SVS38020, SVS38021 | 1 1/2 |
|
Automatic Blowdown System ES81600 |
1/4 |
|
Condensate Return Systems, 1PH ES38083V, SVS38013, SVS38014, SVS38015, SVS38017 |
3/4 |
|
SVS38018, ES38084V, SVS38022 |
1 1/2 |
| SVS 38019 | 1 1/2 |
|
All 3-Phase Condensate Return Systems† |
1/4 |
† 3 pole motor starter required