Installation, Operation & Maintenance Manual
E
coer
96%
A
F
UE
Gas Furnace
| 21
E
coer
I
nc
.
|
07-2021
Data subject to change
NOTICE:
In this installation, hoses connecting between ports of
overflow protection pressure switch (overflow switch)
and pressure tabs on the condensate collector box MUST
be switched. The overflow switch has two ports, which is
different from two other regular pressure switches that
have only one port. Make sure that black port (positive)
is connected to the lower position tap on condensate
collector box and gray port (negative) to higher tap of
condensate box. Connecting incorrectly will result in
failure to protect condensate overflow. See Fig. 19.
Figure 18
Condensate
Collector
Box
B
A
+
_
Upflow & Horizontal Right side
˖
A to + P1(black port)
B to – P2(grey port)
Horizontal Le side
˖
˖
A to – P2(grey port)
B to + P1(black port)
NOTICE:
Two pressure switches (one port type switches) should
be relocated to other side of furnace side panel to ensure
pressure switches are above water tap of condensate
collector box.
