Payne PG92ESA Installation, Start-Up, Operating And Service And Maintenance Instructions page 21

Evaporator Coil
+
+
+
Condensing
+ Furnace
+
+
Blower
+ = Positive pressure
< + = Pressure lower than areas with +
( = Negative pressure
INSTALLATION
NOTICE
This furnace is certified to leak 2% or less of nominal air
conditioning CFM delivered when pressurized to 1- -in. water
column with all present air inlets, including bottom closure in
upflow and horizontal applications, air outlets, and plumbing
and electrical ports sealed.
Air gap here
Open standpipe
for coil or
humidifier drain
TEE
(1/2" CPVC to 3/4" PVC
adapter from loose parts bag.)
To open drain
Open standpipe
(Optional when coil drain is
not connected to furnace
3/4" PVC
drain.)
+
+ +
3/4
+
3/4" PVC
3/4
+
+
3/4
1/2" CPVC or larger*
Recommend "T" fitting
high
< +
standpipe of same
< + < +
diameteror larger
3/4
3/4
Fig. 18 - - Example of Field Drain Attachment
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Evaporator Coil
+ + +
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Condensing
Furnace
+
+
+
Blower
-
- -
-
+ = Positive pressure
< + = Pressure lower than areas with +
= Negative pressure
Evaporator Coil
Ä Ä Ä Ä Ä Ä Ä Ä Ä
+
Ä Ä Ä Ä Ä Ä Ä Ä Ä +
Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä
+
Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä
Condensing
+ Furnace
+
+
Blower
-
- -
-
+ = Positive pressure
< + = Pressure lower than areas with +
= Negative pressure
Upflow Installation
CAUTION
!
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in nuisance limit
switch cycling and unit component damage.
When a 17- -1/2- -in. wide upflow N coil is used with a
42060 furnace, the N coil must either be raised using a
transition piece at least 3- -in. (76 mm) high or if a transition
piece is not used, the refrigerant lines must point to the front
of the furnace casing.
21
3/4" PVC
+
+
3/4 +
3/4" PVC
3/4
+
Open standpipe
Air gap required when
+
another drain is connected
+
to furnace drain.
3/4
TEE
(1/2" CPVC to 3/4" PVC
adapter from loose parts bag.)
< +
< +
< +
- 3/4
-
3/4
Open standpipe
(Optional when coil drain is
3/4" PVC
not connected to furnace
drain.)
3/4
+
+
3/4
3/4
3/4" PVC
TEE
3/4
(1/2" CPVC to 3/4" PVC
adapter from loose parts bag.)
< +
< +
< +
- 3/4
-
3/4
A170135