20

VI Wiring — steam

pumped return

10

Figure 10

Control assembly — steam, pumped return

When using a tankless heater, knockout the opening in the inner panel. Locate the controls to allow room for the tankless heater piping. The tankless heater temperature control (not shown) installs in the heater tapping.

7

19

20

18

21

22

23 24

MV

 

 

 

MV/PV

 

 

PV

 

 

 

ALARM

 

9

ALARM

2

24

 

V

 

 

 

(GND)

 

V

 

 

24

 

 

 

SENSE

 

 

SPARK

 

 

3

1

 

 

8

25

4

25

 

 

 

6

5

15

15

 

12

 

 

 

 

 

 

 

11

 

Part Number 550-110-677/0299

Install strain relief bushings wherever electrical wiring passes through jacket.

 

26

16

13

27

 

 

13a

 

14

17

Vent connections — Connect with ¼" tubing and run vent line outside building per code requirements.

677-01-p

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Image 20
Weil-McLain EGH-105, EGH-125 manual Control assembly steam, pumped return