Weil-McLain WM97+70 Specifications Page 76
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Part number 550-142-120/0113
WM97+ gas-fired water boiler — Boiler Manual
– 76 –
BOILER MODEL
Check the boiler model against the model listed on
the boiler’s rating plate. Change the selection to the
correct model if not. Also verify the model number
on the WM97+ control display at power-up. Failure
to correct could result in severe personal injury,
death or substantial property damage.
HIGH ALTITUDE
If the boiler is installed at an altitude above
5,500 feet, select YES for high altitude. The WM97+
control will automatically adjust firing rates (blower
speeds) to compensate for altitude.
HIGH LIMIT TEMPERATURE
The boiler’s high limit temperature during normal
operation is fixed at 200°F and cannot be changed.
The HIGH LIMIT TEMPERATURE setting in the
WM97+ control menu is a temporary setting for
test purposes ONLY.
1. If boiler outlet water temperature exceeds this temperature,
the WM97+ control will shut down the boiler and enter lock-
out. Manual reset is required to restart the boiler.
2. The HIGH LIMIT TEMPERATURE setting will automatically
return to 200°F if power is turned off. The boiler will restart
when power is restored.
3. Use this control setting only to test the control’s high limit
function.
WWSD
1. WWSD stands for “warm weather shutdown.” It means the
boiler will not be allowed to fire if the outside temperature is
greater than the WWSD setting.
2. When the boiler is kept off because the outside temperature
is above WWSD, the graphic display will show “WWSD,” and
the boiler will remain in standby until the outside temperature
drops below WWSD temperature.
3. WWSD does not apply to DHW systems.
4. The outdoor sensor must be installed to use this function.
The
outdoor sensor must be installed unless specifically
exempted in the Energy Act statement on page 133.
ADJUST OUTDOOR
1. Use this setting to adjust the outdoor sensor temperature to
account for solar or other effects, such as long lead wire, that
would cause the sensor to read incorrectly.
BOILER SETTINGS menus (continued)
Figure 86 BOILER SETTINGS menus (see Figure 84, page 74 for access information)
Menu/Item Units
Low
Value
High
Value
Default Comment
Boiler Model 70
110
155
factory
THIS MUST BE SET CORRECTLY FOR SAFE
OPERATION. Adjusts blower speeds and flame
sense (Display will show “HA” after the model number if high
altitude has been selected, below.)
High Altitude yes or no no Adjusts ignition and low fire fan speed (for altitudes above 5,500
feet only)
High Limit °F 50 200 200 If boiler out temperature reaches this temperature, boiler will
lockout, which requires a manual reset
WWSD Temp °F Off, 50 100 70 Boiler will not respond to heating calls above this outdoor temp
Adjust Outdoor °F
(difference)
-10 +10 0 This value plus outdoor sensor reading equals outdoor temp
(Use this setting to compensate for solar gain or other factors
that cause a shift in sensor temperature.)
- Boiler Manual 1
- Contents 6
- Please read before proceeding 7
- Boiler location 8
- Boiler location (continued) 9
- Wall-mounting the boiler 10
- (continued) 11
- Boiler hydrostatic test 12
- (see legend at right) 13
- (see legend below) 13
- Part number 550-142-120/0113 14
- (cont.) 15
- Gas piping — sizing gas lines 18
- Venting/air piping — general 19
- Vent termination requirements 23
- Boiler room air openings 24
- Sidewall with separate pipes 27
- Sidewall concentric 29
- Vertical with separate pipes 31
- Vertical concentric 33
- Prepare roof penetrations 34
- Mount concentric termination 34
- USE SWEEP ELBOWS FOR ALL 36
- VENT AND AIR PIPING — DO NOT 36
- Install water piping 37
- WM97+70 or 110 only 40
- WM97+155 only 41
- Existing expansion tanks 42
- Expansion tank — WM97+155 43
- System piping (continued) 45
- Multiple boiler installations 56
- Install condensate line 62
- Gas piping 63
- Field wiring 64
- Field wiring (continued) 65
- Wiring diagram — schematic 67
- Wiring diagram — ladder 68
- ONLY if the system meets the 69
- WM97+ control operation 71
- WM97+ control settings 74
- BOILER SETTINGS menus 75
- HEAT SETTINGS menus 77
- DHW SETTINGS menus 80
- CIRCULATOR EXERCISING and 82
- DIAGNOSTIC menu 83
- DIAGNOSTICS menu (continued) 84
- MAINTENANCE INFO 86
- Startup — fill the system 87
- Freeze protection (if used) 88
- Startup — final checks 89
- 70 or 110 89
- Check water piping 90
- Check gas piping 90
- Check-out/startup verification 94
- Owner maintenance 95
- Service technician 95
- Annual startup 96
- Annual startup (continued) 100
- Troubleshooting 102
- Troubleshooting (continued) 103
- Maintenance 110
- Inspect and clean the burner 112
- Tools required 112
- Before proceeding: 112
- Cleaning the WM97+155 heat 115
- Replacement parts 118
- Replacement parts (continued) 119
- Dimensions 132
- Ratings — WM97+ boilers 133
- HIGH __ MED __ LOW __OFF __ 135
- HIGH __ LOW __ MED __OFF __ 136
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