16

VI Wiring β€” steam

gravity return

10

Figure 8

Control assembly β€” steam, gravity 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

 

 

 

 

 

Part Number 550-110-677/0299

Install strain relief bushings wherever electrical wiring passes through jacket.

 

11

 

26

 

13

16

27

 

13a

14

17

Vent connections β€” Connect with ΒΌ" tubing and run vent line outside building per code requirements.

677-01

Page 16
Image 16
Weil-McLain EGH-105, EGH-125 manual Control assembly steam, gravity return, 13a