Allied A95UH1E - Condensate Piping; CONDENSATE TRAP AND PLUG LOCATIONS

507276-03 Page 35 of 59Issue 1621
4. Install drain trap using appropriate PVC ttings, glue
all joints. Glue the provided drain trap as shown in
Figure 57. Route the condensate line to an open drain.
Condensate line must maintain a 1/4” downward slope
from the furnace to the drain.
5. Figures 52 and 53 show the furnace and evaporator coil
using a separate drain. If necessary the condensate line
from the furnace and evaporator coil can drain together.
See Figure 55 and 56.
Upflow furnace (Figure 51) - In upflow furnace
applications the eld provided vent must be a minimum
1” to a maximum 2” length above the condensate drain
outlet connection. Any length above 2” may result in a
ooded heat exchanger if the combined primary drain
line were to become restricted.
Horizontal furnace (Figure 53) - In horizontal furnace
applications the eld provided vent must be minimum
4” to a maximum 5” length above the condensate drain
outlet connection. Any length above 5” may result in a
ooded heat exchanger if the combined primary drain
line were to become restricted.
NOTE: In horizontal applications it is recommended to
install a secondary drain pan underneath the unit and trap
assembly.
NOTE: Vinyl tubing may be used for condensate drain.
Tubing must be 1-1/4” o.d. X 1” i.d. and should be attached
to the drain on the trap using a hose clamp.
Condensate Piping
This unit is designed for either right or left side exit of
condensate piping in upow applications. In horizontal
applications, the condensate trap must extend below the
unit. An 8” service clearance is required for the condensate
trap. Refer to Figure 50 for condensate trap locations.
Figure 57 shows trap assembly using 1/2” PVC or 3/4” PVC.
NOTE: If necessary the condensate trap may be installed
up to 5’ away from the furnace. Use PVC pipe to connect
trap to furnace condensate outlet. Piping from furnace must
slope down a minimum of 1/4” per ft. toward trap.
1. Determine which side condensate piping will exit the
unit, location of trap, eld-provided ttings and length
of PVC pipe required to reach available drain.
2. Use a large at head screw driver or a 1/2” drive socket
extension and remove plug (Figure 50) from the cold
end header box at the appropriate location on the side
of the unit. Install provided 3/4 NPT street elbow tting
into cold end header box. Use Teon tape or appropriate
pipe dope.
3. Install the cap over the clean out opening at the base
of the trap. Secure with clamp. See Figure 57.
6. If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in Unit
Start-Up section.
Figure 50
Do not use copper tubing or existing copper condensate
lines for drain line.
CAUTION