Table of Contents
Advertisement
®
SlimFit
Series 3
Check-out/startup verification
Fill out start-up data on the Installation
and Service Certificate, page 123.
❏ Verified that the Control is set for the correct boiler model?
❏ Boiler and heat distribution units filled with water?
❏ Water chemistry verified per page 83?
❏ Automatic air vents, if used, open one full turn?
❏ Air purged from system?
❏ Air purged from gas piping? Piping checked for leaks?
❏ Primed condensate trap?
❏ Propane conversion kit installed for propane firing and
propane conversion label affixed to jacket?
SlimFit boilers are shipped ready to fire natural
gas ONLY. You must install the propane conver-
sion kit if the boiler will be connected to pro-
pane. See page 8. Failure to comply could result
in severe personal injury, death or substantial
property damage.
❏ Thermostat circuit wiring checked to ensure there are no
stray voltages?
❏ Followed Operating Instructions, Figure 75, page 88
❏ Burner flame and combustion verified per page 86?
❏ Verified control operation for space heating and DHW (if
used) per this manual?
❏ Tested additional field-installed controls — If boiler has
additional limits, have they been tested for operation as
outlined by manufacturer? (Boiler should be operating and
should go off when controls are tested. Verify controls cause
automatic reset lockout or manual reset lockout as desired.)
❏ Set additional field-installed limit control(s) to system
temperature requirements? Adjusted balancing valves and
controls to provide design temperature to system?
❏ For multiple zones, adjusted for correct flow in each zone?
❏ Verified thermostat heat anticipator (if available) set prop-
erly (see page 63 for requirements)?
❏ Cycled boiler with thermostat (and with DHW aquastat,
if installed) — Raised to highest setting and verified boiler
goes through normal startup cycle? Lowered to lowest set-
ting and verified boiler goes off?
❏ Measured natural gas input? (page 86)
❏ Checked incoming gas pressure as specified on page 49
(natural gas) or (propane).
❏ Observed several operating cycles for proper operation.
❏ Set room thermostat to desired room temperature (and
DHW aquastat, if installed, to desired DHW storage
temperature)?
❏ Reviewed all instructions shipped with this boiler with
owner or maintenance person?
❏ Fill in
❏ Fill out the warranty registration card and send to
Weil-McLain.
❏ Return instructions to envelope and give to owner or place
inside boiler housing.
Part number 550-100-168/0516
COMMERCIAL CONDENSING GAS
on page 123.
-
FIRED WATER BOILER
Gas valve leakage testing
DO NOT connect a manometer to the manual gas valve or
the automatic gas valve. The high vacuum from the blower
could pull fluid into the gas line, possibly damaging the
gas valves.
1. Refer to the gas valve manufacturer's instructions for the procedure
to test the valve.
2. To operate the two valve solenoids independently, navigate to the Valve
Test Screen on the Control (see Figure 67, page 77 for access sequence).
3. When in the Gas Valve Test Screen, you will see two options:
a. Open Gas Valve 1
b. Open Gas Valve 2
4. To open only gas valve 1, highlight it and press enter/save.
5. While still in the Gas Valve test screen, give the boiler a call for heat.
The boiler will go through it's normal Ignition sequence, but will
only open Gas Valve 1.
6. After gas valve 1 has opened, end the call for heat.
7. This procedure can be repeated by selecting and entering Open Gas
Valve 2.
8. After the testing is complete and the call for heat has been removed,
use the back button to exit the Gas Valve Test Screen. This will then
reset the control to open both Gas Valves for any call for heat.
Gas valve test pressure tappings
Use tapping P on gas valve body for pressure connection
after gas valve 1 or between the gas valve seats.
Gas pressure switch settings
1. After testing the gas pressure switches, restore the settings to the
following:
a. High gas pressure switch — 14" w.c.
b. Low gas pressure switch — 2" w.c.
Install a 100% lockup gas pressure regulator in the gas
supply line if inlet pressure can exceed 14" w.c. at any
time. Adjust the lockup regulator for 7 to 10" w.c. inlet
pressure. This setting provides a cushion below the set-
ting of the high gas pressure switch. Failure to comply
could result in shutdown by the high gas pressure switch,
resulting in possible serious property damage due to
freeze-up.
—
Boiler Manual
Use manual gas valve
side tapping for pressure
connection after gas valve 2.
89
Advertisement
Table of Contents
