ULTRA S4 GAS BOILER UG-105 User Manual

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Part number 550-100-400/0119

Series 4

gas-fired water boiler — Boiler Manual

Venting & air — general (cont.)

Figure 12 Vent and air pipe options and maximum allowable piping lengths

Ultra model

Vent or air

pipe size

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t/VNCFSPGFMCPXTBMMPXFEBUUIFTFMFOHUIT

(All applications include allowance for the terminations.)

Direct vent

Sidewall

with

Weil-McLain

vent/air cap

Direct vent

Sidewall with

separate pipes

— or —

%JSFDUFYIBVTU

(sidewall or vertical)

3” Concentric

Sidewall or Vertical

DO NOT use CPVC

or ABS

[Note 1]

4” Concentric

Sidewall or Vertical

DO NOT use CPVC

or ABS)

[Note 1]

Direct vent

Vertical

with separate

pipes

Direct vent

Vertical exhaust

Sidewall air

Direct vent

only

Direct vent or

Direct exhaust

Direct vent

only

Direct vent

only

Direct vent

only

Direct vent

only

Length Ells Length Ells Length Ells Length Ells Length Ells Length Ells

-80/105

2” * 100 (ab) 2 100 (a) 2 100 (ab) 1 NA 100 (a) 1 100 (a) 1

3” 100 2 100 2 100 1 NA 100 1 100 1

-155 3” 100 2 100 2 100 1 NA 100 1 100 1

-230

3” 30 (c) 2 30 (c) 2 30 (c) 1 30 (c)(d) 1 30 (c) 1 30 (c) 1

4” 100 (d) 2 100 2 70 (d) 1 100 1 100 1 100 1

-299 4” 100 2 100 2 70 (d) 1 100 1 100 1 100 1

-310

4” 100 2 100 2 70 (d) 1 100 1 100 1 100 1

-399 4” 100 2 100 2 NA 100 1 100 1 100 1

Note 1:

IPEX 3” and 4” PVC concentric vent kits can be used with standard PVC pipe, ﬁ ttings and cement (ANSI/ASTM D1785)

except where ULC S636 compliance is required. For ULC S636 compliance, all pipe, ﬁ ttings and cement must be IPEX

System 636. When using IPEX kits, use only IPEX product code 196006 for 3” venting or IPEX product code 196021 for 4”

venting.

Contact Weil-McLain for ordering information and availability of Weil-McLain venting kits.

Polypropylene - Separate pipe and concentric termination by respective manufacturers.

Additional

notes

a —

Use 3”x2” reducer at boiler

b —

Use 3”x2” reducers at termination

c —

Use 4”x3” reducer at boiler

d —

Use 4”x3” reducers at termination

* Ultra-80 and 105 boilers installed with 2-inch vent piping automatically derate due to the pressure loss in the vent and air

piping. The derate ranges up to 10% for the Ultra-80 at 100 feet or 15% for the Ultra-105 at 100 feet.

Equivalent feet for elbows — deduct from maximum equivalent length of

piping:

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฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀

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Stainless steel (AL29-4C) vent pipe

install an adapter at the boiler for all applications. Also install

an adapter at the termination unless using separate-pipe

termination.

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User Manual - Page 18