Weil-McLain SVF 1500 Manual page 2

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
TM
SVF
The Commercial Condensing Water Boiler
1
Heat exchanger stainless steel vertical tube.
2
3 Blower ( SVF 1500 shown)
Air enters through the air intake adapter, then enters the venturi. The blower pulls air
and gas through the venturi and pushes the mixture into the burner. The advanced
blower design and air inlet silencer yield very quiet operation.
4 Air filter
5
When air flows through the swirl plate/shroud, it creates a vacuum that is sensed by
the gas valve to regulate gas flow.
6 Control module
7
The expansion module operates the gas valve, monitors gas pressure switches and
provides a dry contact for the boiler circulator (suitable for up to 10 amps). Connec-
tions for BMS and Boiler-to-Boiler communications are also located on the board.
8 Electronic display & buttons
The electronic display is used to configure boiler settings and monitor boiler op-
eration. The buttons allow changing display mode, entering and setting values, and
resetting after lockout.
9 Transformer
10
11 Blower relay ( 1500/2000)
SVF
12 ON/OFF switch
13
The automatic gas valve incorporates two solenoid-operated valve seats. The valve
senses the vacuum in the venturi (item 5) caused by flowing air. Gas flows in propor-
tion to air flow, so air/fuel ratio remains constant as blower speed/air flow changes.
14
This line is used to measure the pressure of the incoming air to the venturi and adjust
the combustion accordingly.
15
16
17
Knockouts are provided in the terminal box, allowing conduit entry right of the
low-voltage and line-voltage field wiring terminal strips.
18 High gas pressure switch (mounted on the right side of gas valve)
19 Low gas pressure switch
20 Air pressure switch – Maximum flue pressure
21 Low water cutoff (shown in Top View)
The low water cutoff is mounted in a tapping on the top water outlet pipe. (Built in
test button - Manual reset is done through main control)
22
Made with high-grade stainless steel and fiber mesh construction, the burner uses
pre-mixed gas and air.
23
The burner flame is ignited by applying a high voltage to the ignition electrode, lo-
cated in the combustion chamber. This causes a spark (from electrode to ground).
After ignition, the flame sense rod measures flame signal.
24 Flame inspection window
The quartz glass windows provides a view of the burner surface and flame.
25 Water outlet pipe (system supply) 3" Class 150 flanged
26 Water return pipe (system return)
27 Gauge port
The pressure/temperature gauge is shipped loose for field installation in this port and
can be installed on either side of water outlet pipe (system supply).
28
The relief valve is shipped loose for field installation on this nipple.
29 Temperature sensor port — Boiler outlet water temperature
The outlet sensor port is located on top of the supply pipe, just outside the heat
exchanger.
2
Contactor ( 2500/3000)
SVF
3" Class 150 flanged
The control can operate a single boiler or coordinate with other
SVF 1500-3000 Series 1 boilers in a multiple boiler system.
Control inputs and outputs allow operation of multiple heating circuits
(space heating and DHW, for example).
Up to three priority levels can be set, providing automatic switch-over on
demand.
This manual provides quick set-up information for single boiler installa-
tions.
The Advanced Manual, also supplied with the boiler, provides instruc-
tions for setting up multiple-boiler systems and for using advanced
options for single boilers.
Control operation
The control responds to signals from the room thermostats, DHW
aquastats (if used), boiler sensors (boiler outlet, boiler inlet, flue tem-
perature), outdoor temperature and system sensor, if used.
The control automatically adjusts blower speed (and gas flow rate) to
match boiler output to space heating and/or DHW heating demand.
The default control settings provide for three space heating zones. The
control can be easily set up for operation with a DHW zone, with or
without domestic priority.
Control WIZARD
The control setup Wizard is available from the BOILER SETTINGS
menu that appears during initial startup.
The Wizard leads through a step-by-step setup procedure designed for
the application chosen.
Context-sensitive help is available to explain the purpose of key setup
items.
30 Temperature sensor port — Boiler inlet water temperature
The return sensor port is located on top of the return pipe, just outside the heat
exchanger.
31 Flue temperature port sensor
32 Gas connection – 2" FNPT
33 Vent connection – 3-in-1 adapter allows PVC/CPVC, Poly Pro or stainless
steel connection. If using PP or SS brands other than M & G Duravent consult
manufacturer for proper adapter.
34 Filter minder
35 Jacket panels
The three (3) front jacket panels and four (4) side jacket panels are removable for ac-
cess to the blower, gas valve, pressure switches, controls and the ASME Rating plate.
36 Boiler top panels - The top panel has a opening for gas connection.
37 Casters (used for locating boiler only)
38
39
40 Condensate Trap
41
The plate has all the ASME Section IV required information.
Part number 550-100-250/0819