Thermo Pride CHB1-50N Installation And Operation Manual page 30

All installations and services must be performed by qualified service personnel.
2. Determine from which side of the furnace the condensate disposal line will be run.
NOTICE: On the model series CHB1 / CDB1 the condensate disposal line must be on the
same side as the flue outlet or, in the case of a horizontal application, the bottom of unit.
Drive two (2) #8 x 3/4 inch sheet metal screws with black protective coating (supplied with
furnace) to attach the condensate trap to the furnace casing. Pilot holes are provided on both
sides of the casing for mounting the trap.
NOTICE: When the CDB1 series unit is used in a horizontal application, the connection
of the drain hose to the collector box must be changed from the standard, factory-supplied
location to a lower location on the collector box to permit proper drainage of condensate from
the furnace. A knockout has been provided in the furnace side casing for the drain hose to
exit. The connection change can be accomplished as follows. Refer to Figure 16 for a
depiction of a properly completed relocation.
a) Locate and disconnect the drain hose from the standard connection location at the
collector box.
b) Locate and uncap the drain at the bottom (with the furnace lying on a side) of the collector
box.
c) Connect the drain hose from Step (a) to the uncapped bottom drain from Step (b).
d) Close off the previous drain connection from Step (a) with the cap removed in Step (b).
3. Attach one (1) drain hose (a length of 11/16 inch O.D. clear, colorless tubing) to the front
connection (on the model series CHB1) or the bottom connection (on the model series CDB1)
of the condensing coil cover plate.
Insert the snap-in-place plastic bushing, provided in the furnace parts package, into the
proper hole in the furnace casing to prevent cuts in the drain tubing. Route the drain tubing
through the bushing. When making connections with the clear tubing, carefully route the
tubing in a manner to prevent kinking or abrasion of the tubing.
Slip the free end of the drain hose over the hose barb on one (1) side of the plastic hose barb
tee provided in the CPVC (chlorinated polyvinyl chloride) thermoplastic condensate trap
assembly. Secure the drain hose with the spring-type hose clamp provided in the parts
package.
4. Trial fit the second drain hose (a length of 11/16 inch O.D. clear, colorless tubing provided in
the furnace parts package) from the hose barb on the bottom of the PVC exhaust vent drain
tee to the plastic hose barb tee provided in the condensate trap assembly. Make sure the
hose is long enough not to kink or be otherwise restricted once installed. Mark the minimum
length of drain hose required for the application. Remove any extra length from the drain
hose. Attach the drain hose to the hose barb on the other side of the condensate trap tee.
Slip the other end of the drain hose on to the hose barb of the PVC drain tee assembly; refer
to Figure 15 for an illustration. Use the spring-type hose clamp(s) provided in the parts
package to secure all connections.
5. Plan, source, and install a condensate drain line using ½ inch diameter CPVC (chlorinated
polyvinyl chloride) thermoplastic pipe and pipefittings. Route the line in the shortest possible
manner to reach a nearby drain. Secure all joints using CPVC cement. For gravity drainage,
the condensate drain line must maintain a minimum ¼ inch per foot downward slope toward
the drain. The drain line must be watertight, supported, and secured such that it cannot be
easily moved.
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