DRI-STEEM Vapor-logic3 to Vapor-logic4 Adaptor Board Installation Manual • Page 9
Figure 9-1:
Separating safety circuit alarm signals (GTS with door interlock switch)
Low water relay
Blocked flue switch
415A
414A
415
414
24 VAC
801
Door interlock
Main board
Expansion board
11
14
NC
C
14
15
T1
h
VL4 adaptor board with door interlock
Low water relay
Blocked flue switch
24 VAC
801 414
LW
P3
P3-3
P3-4
FPsw
415A415A
Door interlock
414A
415
NC
C
14
15
h
11 14
h
DM-10099
DM-10101
GTS humidifiers:
Safety circuit wiring
The following steps are for GTS without
door interlock switch:
Note: Torque terminal block screws to 2.5 in-lb (0.28 N·m). Torque all
other terminal connections to 7 in-lb (0.79 N·m).
Blocked flue switch (Figure 9-2)
1. Remove wire 414A from position 14 on low water relay. Land this
wire at terminal P3-4 at top of the Vapor-logic4 adaptor board.
2. Remove wire 415 from terminal 15 on Vapor-logic3 main board.
Land wire at one of the h terminals (24 Vac) on terminal strip at
bottom of subpanel.
Low water circuit (Figure 9-2)
3. Remove wire 414 from terminal 14 on Vapor-logic3 main board.
Remove other end of this wire from position 11 on low water
relay. Land one end of this wire at position 14 on low water relay.
Land other end of this wire at terminal P3-3 at top of Vapor-logic4
adaptor board.
4. Locate wire 801 that runs to T1 terminal on expansion board that
was directly to the right of Vapor-logic3 main board. Remove end
of this wire, and land it at position 11 on low water relay.
5. Insert gray-handled jumper supplied with this upgrade kit into
terminals 14 and 15 on Vapor-logic4 adaptor board.
Proceed to “Start-up and validation” on Page 19.
Figure 9-2:
Separating safety circuit alarm signals
(GTS without door interlock switch)
VL3 without door interlock
Low water relay
Blocked flue switch
24 VAC
801
Main board
Expansion board
415
414
414A
11 14
C NC
14
15
T1
h
VL4 adaptor board without door interlock
Low water relay
Blocked flue switch
24 VAC
801 414
414A415
11 14
C NC
LW
P3
P3-3
P3-4
FPsw
14
15
h
h
Gray-handled
jumper provided
with upgrade kit
DM-10100
DM-10102
VL3 with door interlock VL4 adaptor board with door interlock
VL3 without door interlock
VL4 adaptor board without door interlock
(24 paginas)
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