Weil-McLain SlimFit 2 Series Manual page 42

™
SlimFit
COMMERCIAL CONDENSING GAS
Install condensate components
Connect condensate trap
1. See Figure 42.
2. Remove the protector cap from the bottom of the PVC tee at the
heat exchanger condensate connection (location 2).
3. Slide a hose clamp over each end of the condensate trap line.
4. Slide the ends of the line onto the bottom of the PVC tee at the
heat exchanger condensate connection (location 2) and onto the
PVC coupling on the right (location 1).
5. Slide the hose clamps into position and tighten securely.
Connect condensate line
1. Connect condensate drain tubing to the 1" PVC condensate tee and
run to floor drain or condensate pump (see Figure 43). Use 1" PVC
or CPVC pipe; or install a hose barb fitting and connect tubing.
Use materials approved by the authority having jurisdic-
tion. In the absence of other authority, PVC and CPVC
pipe must comply with ASTM D1785, F441 or D2665.
Cement and primer must comply with ASTM D2564
or F493. For Canada, use CSA or ULC certified PVC or
CPVC pipe, fittings and cement.
2. Leave the top of the 1" tee OPEN. This is needed as a vacuum break.
3. When installing a condensate pump, select one approved for use
with condensing boilers and furnaces. The pump should have an
overflow switch to prevent property damage from condensate
spillage. See Figure 41 for required flow capacity.
4. When sizing condensate pumps, make sure to include the total
load of all SlimFit boilers connected to it.
The condensate line must remain unobstructed, allow-
ing free flow of condensate. If condensate is allowed to
freeze in the line or if the line is obstructed in any other
manor, condensate can exit from the boiler tee, resulting
in potential water damage to property.
Condensate from the SlimFit boiler will be slightly acidic
(typically with a pH from 3.2 to 4.5). Install a neutralizing
filter if required by local codes. See Replacement parts
section at the end of this manual for the Weil-McLain
kit.
Condensate pump capacity, GPH
SF-550 14
42
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FIRED WATER BOILER
SF-750 20
—
Boiler Manual Series 2
(continued)
Condensate trap installed (shown with
inlet air silencer hidden)
2
Condensate pump (by others), typical
For a condensate pump equipped with an
overflow switch, the switch can be connected
to the external manual reset or automatic
reset limit terminals of the Control. This
would shut down the boiler in the event of a
condensate overflow. See the wiring diagram
for location of the wiring terminals.
Part number 550-100-162/0815
1