Weil-McLain WM97+70 Specifications download pdf (Page 62)

Part number 550-142-120/0113

WM97+ gas-fired water boiler — Boiler Manual

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Install condensate line

Prepare condensate trap assembly

1. Remove the condensate trap kit from the accessories bag.

2. See Figure 71. The left image shows the complete condensate trap

kit.

3. Remove the ﬂexible drain tube nut, item 2.

4. Push the ﬂexible tube gasket ring onto the end of the ﬂexible tube

(item 1) as shown in Figure 71. The tube should extend through

the gasket (item 3) about ¼ inch.

5. Insert the ﬂexible tube and gasket into the drain ﬁtting. When in

position, the offset edge of the gasket ring will rest on the shoulder

of the drain ﬁtting as shown in Figure 71, detail 6.

6. Secure the ﬂexible tube in place by screwing on the nut, item 2.

Finger tighten securely.

Install the condensate trap assembly

1. Insert the condensate trap ball, Figure 71, item 5 into the trap

body (item 4).

The condensate trap ball MUST be in place in the con-

densate trap assembly to prevent possible ﬂue gas leakage

through the condensate drain system.

2. Loosen the top nut on the trap body.

3. Slide the trap assembly onto the boiler condensate outlet. Firmly

hand tighten the upper nut to secure the condensate trap in place.

Condensate drain system

1. Install condensate drain by connecting tubing or PVC pipe

to the ﬂexible drain line. Run the drain tubing or piping to a

ﬂoor drain or condensate pump

. The ﬂexible drain line will ﬁt

in a ¾” PVC coupling. Run minimum ½” PVC for the piping to

drain or condensate pump.

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. Select a condensate pump (if used) that is approved for use with

condensing boilers and furnaces. The pump should have an

overﬂow switch to prevent property damage from condensate

spillage. The pump should have a minimum capacity of 2 GPH

for the WM97+70, 3 GPH for the WM97+110, or 4 GPH for the

WM97+155.

3. When sizing condensate pumps, make sure to include the total

load of all appliances 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 WM97+ boiler will be slightly acidic

(typically with a pH from 3.2 to 4.5). Install a neutralizing

ﬁlter when draining into metal pipe and if required by

local codes. See Replacement parts section at the end of

this manual for the Weil-McLain kit.

The condensate trap must be in place

during all operation. Make sure the trap

is securely attached to the condensate

outlet and that the condensate discharge

line is in good condition and installed

per this manual. Failure to comply could

result in severe personal injury, death or

substantial property damage.

Figure 71

Condensate trap assembly

Figure 72 Condensate trap connection

(WM97+70/110 shown)

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Weil-McLain WM97+70 Specifications Page 62

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