Allied A97USMV, Руководство по установке

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506887-01 Page 25 of 78 Issue 1213
1. Determine which side condensate piping will exit the
unit, location of trap, field-provided fittings and length of
PVC pipe required to reach available drain.
2. Use a 3/8 allen wrench and remove plug (Figure 30)
from the cold end header box at the appropriate
location on the side of the unit. Install field-provided 1/
2 NPT male fitting into cold end header box. UseTeflon
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 33.
4. Install drain trap using appropriate PVC fittings, glue all
joints. Glue the provided drain trap as shown in Figure
33. Route the condensate line to an open drain.
Conden
-sate line must maintain a 1/4” downward slope from
the furnace to the drain.
5. Figures 33 and 34 show the furnace and evaporator
coil using a separate drain. If necessary the conden-
sate line from the furnace and evaporator coil can drain
together. See figures 35, 36 and 37.
Upflow furnace (figure 30) - In upflow furnace applica-
tions the field 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
flooded heat ex -changer if the combined primary drain
line were to bec -ome restricted.
Horizontal furnace (figure 33 or 37) - In horizontal furn-
ace applications the field provided vent must be a min-
imum 4" to a maximum 5" length above the condensa-
te drain outlet connection. Any length above 5" may
result in a flooded heat excha- nger 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" OD X 1" ID and should
be attached to the drain on the trap using a hose
clamp.
6. If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in Unit
Start-Up section.
Condensate line must slope downward away from the
trap to drain. If drain level is above condensate trap,
condensate pump must be used. Condensate drain
line should be routed within the conditioned space to
avoid freezing of condensate and blockage of drain
line. If this is not possible, a heat cable kit may be
used onthe condensate trap and line. Heating cable
kit is available in various lengths; 6 ft. (1.8 m) - kit
no.26K68; 24 ft. (7.3 m) - kit no. 26K69; and 50 ft.
(15.2 m) - kit no. 26K70.
Do not use copper tubing or existing copper condensate
lines for drain line.
CAUTION
Condensate Piping
This unit is designed for either right or left side exit of
condensate piping in upflow 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 34 for condensate trap locations.
NOTE: If necessary the condensate trap may be installed
up to 5” away using PVC pipe from the furnace. Piping from
furnace must slope down a minimum of 1/4” per ft. toward
trap.
DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
NOTE: Do not discharge exhaust gases directly into any chimney
or vent stack. If vertical discharge through an existing unused chim-
ney or stack is required, insert piping inside chimney until the pipe
open end is above top of chimney and terminates as illustrated. In
any exterior portion of chimney, the exhaust vent must be insulated.
Figure 30
Figure 31