Weil-McLain Ultra Electric Water Heater User manual

®
Gas-fired water boilers
®
Featuring
Flexibility
JOB NAME

Boiler loop piping and components
The piping must be installed as primary/secondary, with the boiler on its own loop as
shown in the Ultra boiler manual and in this guide. Use the pipe sizes listed below.
Pipe, valves, (2) unions and other fittings:
(include flow/check valve)
Ultra-550
Ultra-750 2” or larger
Boiler loop circulator (by installer) — Recommended sizing is for a 30°F temperature
rise (= 35 GPM for Ultra-550 or 45 GPM for Ultra-750) — Allow 11 feet w. c.
head loss through boiler at recommended flow rates (Taco 1400-50 or equivalent)
Boiler drain valve, ¾”
System, DHW and zone piping and other piping
System circulator and zone circulators (or zone valves)
DHW circulator
Pipe, valves and fittings for system, DHW and zone piping
Air separator and expansion tank
Fresh water make-up piping and components
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Gas piping, valves and fittings; union & manual valve for boiler connection
Install a lock-up regulator if gas pressure can exceed 14”w.c.
Relief valve — ¾”pipe and elbows for discharge piping
Pipe or tubing for condensate line — 1”PVC pipe connection
Condensate neutralizing kit when req’d (W-M part # 383-500-076)
Condensate pump (required if condensate cannot drain by gravity)
Other
Antifreeze, when required — Use only antifreeze listed in Ultra boiler manual
as suitable for use with Ultra Gas boilers — Ask yourWeil-McLain distributor for
information or visit us online at www.weil-mclain.com to review Ultra literature.
Special applications
Propane — Propane conversion kit is supplied with the boiler. See boiler manual.
High altitude — High altitude (over 5,500 feet) requires only changing the altitude
setting on the U-Control.
Electrical connections
Wiring materials, fuses/breakers and shut-off switches
Boiler line voltage power — Boiler load is 18 amps. Provide a fused disconnect or
service switch (25- or 30-ampere rated recommended) as required by codes.
Boiler circulator line voltage power — Provide and install a fused disconnect
or service switch (15-ampere rated recommended) as required by codes for circulator
with maximum load of 10 amps.)
Zone valves and other system control devices, as required
Carbon monoxide detector, when required
Recommended equipment
Use a combustion analyzer to verify boiler operation, see the Ultra boiler manual.
U-tube manometer for checking gas line pressure
Volt-ohmmeter may be required for troubleshooting
Material checklist — piping and other
Vent, 6”
Supply, 2”
Gas, 1¼”
Return, 2”
Condensate
drain, 1”
Air, 6” Electrical
en
ir, 6
”
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Wiring
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Boiler loop circulator, by installera
Boiler loop piping, minimum 2”b
Flow/check valve in boiler loopc
Strap-on system supply and returnd
temperature sensors, supplied
with boiler
System circulator, typical, bye
installer
Air separator, by installer
f
Expansion tank and make-upg
water components, by installer
Install a union near boiler on sup-
h
ply and return connections
Boiler relief valve, field installed on
i
2-inch tee (supplied with boiler)
Install bibb valves for purging
j
Install a ¾-inch boiler drain valvek
(by others) on the boiler return
connection

Venting
options:
Direct exhaust (use inside air), sidewall or vertical
Direct vent (pipe air to boiler), sidewall or vertical
Ultra model
Vent or air
pipe size
t"MMPXBCMFQJQFTJ[FTPGWFOUBJSQJQJOH — applies to all
BQQMJDBUJPOTXIFUIFSEJSFDUFYIBVTUPSEJSFDUWFOU
t.BYJNVNFRVJWBMFOUGFFUPGFBDI
t/VNCFSPGFMCPXTBMMPXFEBUUIFTFMFOHUIT
(All applications include allowance for the termination.)
Sidewall with
separate pipes
Vertical with
separate pipes
Length Ells * Length Ells *
550 6” 100 2 100 2
750
6”302302
8” ** 100 2 100 2
* Equivalent feet for elbows — Deduct 7 feet for each additional 6-inch or
8-inch elbow (90° or 45°) from maximum equivalent length of piping.
** Install a pipe reducer to adapt from 8”PVC to the 6”PVC pipe size re-
quired at the boiler. You do not have to reduce allowable pipe length for
the reducer. Install reducer directly at the boiler, oriented vertically.
Items Material 4UBOEBSETGPSJOTUBMMBUJPOTJO
United States Canada
Plastic WFOUBJSpiping material options
Vent or air pipe
& fittings
PVC schedule 40 ANSI/ASTM D1785
Plastic vent pipe
must be certified
to UL S636 when
required.
Air pipe can be any
of those listed at
left if acceptable for
local codes.
PVC-DWV ANSI/ASTM D2665
CPVC schedule 40 ANSI/ASTM F441
ABS-DWV schedule 40 ANSI/ASTM D2661
PVC & ABS pipe
cement & primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
DO NOT use cellular core pipe for vent or air piping.
1JQFBOEmUUJOHTGPSWFOUBOEBJS
Material — PVC CPVC ABS
6” 8”
Straight pipe
feet
Elbows, 90-degree (include termination elbows as
needed)
Couplings (include termination, used for vertical vent
or sidewall vent if no external upwards extension)
Return bend, 180-degree (vertical air-pipe termina-
tion)
1
Reducers, 8"x6" (for Ultra-750 only when using
8-inch vent and/or air piping)
1 (direct exhaust)
2 (direct vent)
$PNCVTUJPOBJSWFOUJMBUJPOPQFOJOHT
Louvers for ventilation openings, when specified in boiler manual
(required for all direct exhaust applications)
Material checklist — vent and air piping
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DIRECT EXHAUST
SIDEWALL
DIRECT VENT
SIDEWALL
DIRECT EXHAUST
VERTICAL
DIRECT VENT
VERTICAL
SNORKELING OPTION — Vent pipe can
be extended up as shown at left. See
manual for details.
SNORKELING OPTION — Vent pipe can
be extended up as shown at left. See
manual for details.
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C-1125 (10/09)