Weil-McLain HE (Series 2) Guide

Part No. 550-100-027/0404
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use any phone in your
building.
•Immediately call your gas supplier from a neighbor’s phone. Follow
the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service
technician or the gas supplier.
If the information in this manual is not followed exactly, a fire or
explosion may result, causing property damage, personal injury or
loss of life.
User’s
Information
Manual
with
Ultra-80, -105, -155, -230 & -310
NOTICE:
Series 1/Series 2 identification
Read the boiler rating plate to
determine the series number. The
rating plate is located on the right
side of the boiler.
Gas-fired
Water boiler
Series 2

Part number 550-100-027/0404
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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
The Boiler manual is for use only by a qualified heating installer/service
technician. Refer only to this User’s Information Manual for your reference.
Improper installation, adjustment, alteration, service or maintenance can cause
property damage, personal injury (exposure to hazardous materials) or loss of
life. Installation and service must be performed by a qualified installer, service
agency or the gas supplier (who must read and follow the supplied instructions
before installing, servicing,or removing this boiler. This boiler contains materials
that have been identified as carcinogenic, or possibly carcinogenic, to humans).
When calling or writing about the boiler— Please have the boiler model number
from the boiler rating label and the CP number from the boiler jacket.
Please read this page first
The following defined terms are used throughout this manual to bring attention to the presence
of hazards of various risk levels or to important information concerning the life of the product.
Indicates presence of hazards that will cause severe personal injury, death or
substantial property damage.
Indicates presence of hazards that can cause severe personal injury, death or
substantial property damage.
Indicates presence of hazards that will or can cause minor personal injury or
property damage.
Indicates special instructions on installation, operation or maintenance that are
important but not related to personal injury or property damage.
Hazard definitions
Boiler service and
maintenance
How to use this
manual . . .

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
STOP!! — Read before proceeding
Boiler service and maintenance —
• To avoid electric shock, disconnect electrical supply before
performing maintenance.
• To avoid severe burns, allow boiler to cool before performing
maintenance.
• You must maintain the boiler as outlined in this manual and have the
boiler started up and serviced at least annually by a qualified
service technician to ensure boiler/system reliability.
Boiler operation —
• Do not block flow of combustion or ventilation air to boiler. This
boiler is equipped with a control which will automatically shut down
the boiler should air or vent be blocked. If vent or air blockage is
easily accessible and removable, remove it. The boiler should attempt
to restart. If blockage is not obvious or cannot be removed, have the
boiler and system checked by a qualified service technician.
• Do not allow contaminated air to enter the boiler air inlet pipe. See
page 4 for details.
• Should overheating occur or gas supply fail to shut off, do not
turn off or disconnect electrical supply to boiler. Instead, shut off the
gas supply at a location external to the appliance.
•Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect the boiler
and to replace any part of the control system and any gas control, which
has been under water.
Boiler water —
• Have boiler water chemistry checked at least annually by a qualified
service technician.
• DO NOT use petroleum-based cleaning or sealing compounds in
boiler system. Gaskets and seals in the system may be damaged. This
can result in substantial property damage.
• DO NOT use "homemade cures" or "boiler patent medicines".
Serious damage to boiler, personnel and/or property may result.
• Continual fresh makeup water will reduce boiler life. Mineral build-
up in boiler heat exchanger reduces heat transfer, overheats the metal,
and causes heat exchanger failure. Addition of oxygen can cause internal
corrosion in system components. Leaks in boiler or piping must be
repaired at once to prevent makeup water.
•Do not add cold water to hot boiler. Thermal shock can cause boiler
heat exchanger to crack.
Failure to adhere to the guidelines on this page can result in severe
personal injury, death or substantial property damage.

Part number 550-100-027/0404
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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Pool and laundry products and common household
and hobby products often contain fluorine or chlorine
compounds. When these chemicals pass through the
boiler, they can form strong acids. The acid can eat
through the boiler wall, causing serious damage and
presenting a possible threat of flue gas spillage or boiler
water leakage into the building.
Please read the information listed below. If
contaminating chemicals will be present near the
location of the boiler combustion air inlet, have your
installer pipe the boiler combustion air and vent to
another location, per the Boiler manual.
If the boiler combustion air inlet is located in any area
likely to cause contamination, or if products which
would contaminate the air cannot be removed, you
must have the combustion air and vent repiped
and terminated to another location. Contaminated
combustion air will damage the boiler, resulting in
possible severe personal injury, death or substantial
property damage.
Do not operate an Ultra boiler if its combustion
air inlet is located in a laundry room or pool facility,
for example. These areas will always contain hazardous
contaminants.
Prevent combustion air contamination

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Perform maintenance per schedule below
Follow the maintenance procedures given throughout this manual. Failure to perform the service and maintenance or
follow the directions in this manual could result in damage to the boiler or system, resulting in severe personal injury,
death or substantial property damage.

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Boiler must be
serviced and
maintained
The boiler must be inspected and started annually, at the beginning of the heating
season, by a qualified service technician. In addition, the maintenance and care
of the boiler designated on page 5 and explained on pages 6 through 9 must be
performed to assure maximum boiler efficiency and reliability. Failure to service
and maintain the boiler and system could result in equipment failure, causing
possible severe personal injury, death or substantial property damage.
The following information provides detailed instructions for completing the
maintenance items listed in the maintenance schedule, page 5. In addition to
this maintenance, the boiler must be serviced and started up at the beginning of
each heating season by a qualified service technician.
Maintenance procedures
Daily
Verify boiler front
door is securely in
place
1. Visually inspect boiler front door to be sure it is sealed all around its perimeter. Verify that
the two lower thumb screws are tight.
Replace boiler jacket front door after servicing. The boiler front door must be
securely fastened to the boiler to prevent boiler from drawing air from inside
the boiler room. This is particularly important if the boiler is located in the
same room as other appliances. Failure to keep the door securely fastened could
result in severe personal injury or death.
Check air openings 1. Verify that combustion and ventilation air openings to the boiler room and/or building
are open and unobstructed.
2. Verify that boiler vent discharge and air intake are clean and free of obstructions. Remove
any debris on the air intake or flue exhaust openings. If removing the debris does not
allow the boiler to operate correctly afterwards, contact your qualifed service technician
to inspect the boiler and vent/air systems.
To prevent potential of severe personal injury, death or substantial property
damage, eliminate all materials discussed below from the boiler vicinity and the
vicinity of boiler combustion air inlet. If contaminants are found:
Remove products immediately from the area. If they have been there for an
extended period, call a qualified service technician to inspect the boiler for
possible damage from acid corrosion.
If products cannot be removed, immediately call a qualified service technician
to repipe vent and air piping and locate vent termination/air intake away from
contaminated areas.
1. Combustible/flammable materials — Do not store combustible materials, gasoline or
any other flammable vapors or liquids near the boiler. Remove immediately if found.
2. Air contaminants — Products containing chlorine or fluorine, if allowed to contaminate
the boiler intake air, will cause acidic condensate in the boiler. This will cause significant
damage to the boiler if allowed to continue. Read the list of potential materials listed on
page 4 of this manual. If any of these products are in the room from which the boiler
takes its combustion air, they must be removed immediately or the boiler combustion air
(and vent termination) must be relocated to another area. See WARNING above.
Check boiler area
1. Make sure the pressure reading on the boiler pressure/temperature gauge does not exceed
24 psig. Higher pressure may indicate a problem with the expansion tank.
2. Contact a qualified service technician if problem persists.
Check pressure/
temperature gauge

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Maintenance procedures (continued)
Monthly
1. Visually inspect the flue gas vent piping for any signs of blockage, leakage or deterioration
of the piping. Notify your qualified service technician at once if you find any problem.
Failure to inspect the vent system as noted above and have it repaired by a
qualifed service technician can result in vent system failure, causing severe
personal injury or death.
Check vent piping
Check air piping 1. Visually inspect the air inlet elbow to be sure it is unobstructed. Inspect entire length of
air piping to ensure piping is intact and all joints are properly sealed.
2. Call your qualified service technician if you notice any problems.
Check relief valve 1. Inspect the boiler relief valve and the relief valve discharge pipe for signs of weeping or
leakage.
2. If the relief valve often weeps, the expansion tank may not be working properly.
Immediately contact your qualified service technician to inspect the boiler and system.
1. While the boiler is running, check the discharge end of the condensate drain tubing and
the open top of the condensate tee at the boiler (see lower right illustration, page 11, for
location of tee). Make sure no flue gas is escaping from the condensate drain tubing or tee
by holding your fingers in front of the opening.
2. If you notice flue gas escaping, this indicates a dry condensate drain trap. See step 4 for
procedure to fill trap. Call your qualified service technician to inspect the boiler and
condensate line and refill the condensate trap if problem persists regularly.
Under some circumstances an Ultra vent system may not produce enough
condensate to keep the condensate trap full of liquid. If the trap is not full, small
amounts of flue products can be emitted into the boiler room through the
condensate drain line or tee. Follow procedure below to fill trap.
3. Verify that the condensate drain line is unobstructed by slowly pouring water into the top
of the PVC tee on the side of the boiler. The water should run out the end of the condensate
drain line. If the water does not run out, call your qualified service technician to inspect
the boiler and clean or replace the condensate drain line.
4. To fill condensate trap, if necessary, temporarily plug the end of the condensate drain line.
Then slowly pour water into the ½ inch plastic tee on boiler right side. Pour until water
fills drain line, then overflows into the boiler trap tubing. When water fills up to top of ½
inch tee, stop filling. Remove temporary plug from end of condensate drain line.
Check condensate
drain system
1. See illustration at right.
2. Remove the cap from any automatic air vent in the system and
check operation by depressing valve “B” slightly with the tip of a
screwdriver.
3. If the air vent valve appears to be working freely and not leaking,
replace cap “A”, twisting all the way on.
4. Loosen cap “A” one turn to allow vent to operate.
5. Have vent replaced if it does not operate correctly.
Check automatic
air vents (if used)

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
1. Remove boiler front access door and perform gas leak inspection per steps 1 through 7,
Operating Instructions, page 9. If gas odor or leak is detected, immediately shut down
boiler following procedures on page 9. Call a qualified service technician.
2. Visually inspect for leaks around internal water piping. Also inspect external water piping,
circulators, relief valve and fittings. Immediately call a qualified service technician to
repair any leaks.
Have leaks fixed at once by a qualifed service technician. Failure to comply
could result in severe personal injury, death or substantial property damage.
3. Replace door securely after inspections (see WARNING, page 6).
Periodically
1. If the system is equipped with a low water cutoff, test the low water cutoff periodically
during the heating season, following the low water cutoff manufacturer’s instructions.
Test low water
cutoff (if installed)
Every 6 months
Check boiler piping
(gas and water)
End of season
Maintenance procedures (continued)
1. Follow “TO TURN OFF GAS TO
APPLIANCE” on the page 9 of this
manual.
2. Do not drain system unless exposure to
freezing temperatures will occur.
3. Do not drain the system if it is filled with
an antifreeze solution.
4. DO NOT shut down boilers used for
domestic water heating. They must operate
year-round.
1. Before proceeding, verify that the relief valve outlet has been piped to a safe place of
discharge, avoiding any possibility of scalding from hot water.
To avoid water damage or scalding due to valve operation, a metal discharge
line must be connected to relief valve outlet and run to a safe place of disposal.
This discharge line must be installed by a qualifed heating installer or service
technician in accordance with the instructions in the Ultra Boiler Manual. The
discharge line must be terminated so as to eliminate possibility of severe burns
or property damage should the valve discharge.
2. Read the boiler pressure/temperature gauge to make sure the system is pressurized. Lift
the relief valve top lever slightly, allowing water to relieve through the valve and discharge
piping.
3. If water flows freely, release the lever and allow the valve to seat. Watch the end of the
relief valve discharge pipe to ensure that the valve does not weep after the line has had
time to drain. If the valve weeps, lift the seat again to attempt to clean the valve seat. If the
valve continues to weep afterwards, contact your qualified service technician to inspect
the valve and system.
4. If water does not flow from the valve when you lift the lever completely, the valve or
discharge line may be blocked. Immediately shut down the boiler, following the operating
instructions on page 9. Call your qualified service technician to inspect the boiler and
system.
Shut boiler down
(unless boiler used
for domestic water)
Operate relief valve

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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Operating Instructions
FOR YOUR SAFETY READ BEFORE OPERATING
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO THE APPLIANCE
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
WHAT TO DO IF YOU SMELL GAS
A. This appliance does not have a pilot. It is equipped with
an ignition device which automatically lights the burner.
Do not try to light the burner by hand.
B. Before OPERATING, smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor. See
below.
C. Use only your hand to turn the gas control knob. Never
use tools. If the knob will not turn by hand, don't try to
repair it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control, which has been under water.
If you do not follow these instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
1. Stop! Read the safety information above.
This appliance is equipped with an ignition
device which automatically lights the burner.
Do not try to light the burner by hand.
2. Set room thermostat(s) to lowest setting.
Verify external manual gas valve is open
(valve handle parallel to gas piping).
3. Turn OFF POWER switch on the Ultra
control panel.
4. Rotate two thumb screws at bottom of access
door counterclockwise to release door.
5. Remove boiler access door.
6. Turn boiler manual gas valve knob
counterclockwise to open gas supply.
7. Smell for gas in the boiler enclosure. If you
smell gas, STOP! Follow "B" in the safety
information above. If you don't smell gas,
go to the next step.
8. Turn ON POWER switch on the Ultra
control panel.
9. Set thermostat(s) to desired setting.
10. The Ultra control panel display left digit
will show a sequence of numbers (0, 1, 2,
etc.) that indicate boiler control sequence.
Digit 3 or 4 indicates boiler is firing.
Digit 0 means there is no call for heat (all
room thermostats and domestic water
heater satisfied).
11. If the appliance will not operate when
there is a call for heat and piping is not
hot, follow the instructions "To Turn Off
Gas To Appliance" below and call your
service technician or gas supplier.
12. Replace jacket front panel. Make sure
panel is seated firmly in place and all joints
are visually sealed. Then tighten the two
thumb screws at bottom of access door
firmly. Boiler manual
gas valve
1. Set room thermostats to lowest setting.
2. Turn off all electric power to the boiler if service is to be
performed. Turn OFF POWER switch on the Ultra
control panel.
3. Close external manual gas cock (valve handle perpendicular
to gas piping). Remove boiler access door. Turn boiler
manual gas valve knob clockwise to close gas supply.
4. Replace boiler access door.

Part number 550-100-027/0404
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GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
Ultra boiler components . . .
1. Cast aluminum heat exchanger
2. Exchanger access cover
3. Blower
4. Gas valve
4a. Manual gas valve
4b. Gas valve sensing line
5. Venturi
5a. Air inlet silencer
6. Flue gas sensor
7. Outlet water temperature sensor
8. Return water temperature sensor
9. Temperature and pressure gauge
10. Electronic display & buttons
10a. On/off Power switch
11. Flue pipe adapter
12. Burner
13. Water outlet pipe (system supply)
14. Water return pipe (system return)
15. Gas connection pipe
16. PhD Control Module
16a. Top front cover
17. Transformer
18. Air intake adapter
19. Electrical entrance cover plate
19a. Low voltage terminal strip
19b. Line voltage terminal strip
20. Boiler drain valve
21. Line voltage receptacle
22. P/T gauge temperature sensor well
23. Condensate drain connection
(½" PVC tee)
23a. Condensate trap
24. Front door
24a. Thumb screws
25. Ignitor electrode
26. Flame inspection window
27. Data port

Part number 550-100-027/0404 11
GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual
GAS-FIRED WATER BOILER SERIES 2, WITH PhDPhD
PhDPhD
PhD TECHNOLOGY

12 Part Number 550-100-027/0404
GAS-FIRED WATER BOILER SERIES 2 — User’s Information Manual