Weil-McLain HE (Series 2), Руководство пользователя

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Part number 550-100-180/0917
17
Install water piping
(continued)
&IGURE
Zone valve zoning plus optional DHW piping
SlimFit
®
Series 2
COMMERCIAL CONDENSING GAS
-
FIRED WATER BOILER
—
Boiler Manual
Legend — Figure 16
1 SlimFit boiler
2 Indirect water heater (DHW), if used
3 Boiler relief valve (see page 14 for piping details)
4 Relief valve discharge piping (see page 14 for details)
5 DHW circulator)
6 Isolation valves
7 System circulator (see information above for wiring)
8 Diaphragm (or bladder) type expansion tank (see page 16
for piping of closed-type expansion tank, if used)
9 Air separator [with automatic air vent only on systems using diaphragm
(or bladder) type expansion tank]
10 Flow/check valves
11 Purge/drain valves
12 Boiler circulator
13 Zone valves, typical
20 Make-up water supply
21 Primary/secondary connection (tees no more than 8 pipe diameters apart)
24 Strap system supply and return sensors to lines as shown, at least 6 pipe diameters
(but no more than 3 feet) from boiler connection tees.
25 Systems using high-head pumps may require a bypass pressure regulator to prevent
damage to control valves.
26 External drain/blowdown valve, when used.
33 Strainer,
recommended.
Items supplied with boiler
Items supplied by others
ZONE VALVE zoning –
primary/secondary
(Shown with optional DHW piping)
See Figure 16.
This configuration is for zone valve systems using a boiler loop connected
as a secondary circuit off of a primary system loop. The primary/secondary
piping shown ensures the boiler loop will have sufficient flow. It also avoids
applying the high head of the boiler circulator to the zone valves.
1. Install a system circulator (supplied by installer) capable of delivering
the proper flow and head as shown.
2. The flow/check valve shown on the boiler outlet piping prevents gravity
circulation in the boiler loop during DHW heating.
Use
at least
the
-).)-5-
pipe size shown in Figure 12,
page 15 on all boiler loop piping (connecting boiler to and
from the primary/secondary connection, item 21).
0RIMARY
SECONDARY PIPING SHOWN
ensures the boiler loop will
have sufficient flow. For other piping methods, see guidelines
on page 15.
Expansion Tank required
1. Provide a system expansion tank following the guidelines on page 16.
2.
DO NOT use a closed-type tank if connecting to a water heater that is
equipped with an automatic vent.
Domestic Hot Water (DHW) tank, if used
1. DHW direct connection—Pipe from the near-boiler piping to the DHW
tank’s boiler connections as shown.
2. DHW as zone—A DHW tank can be connected as a zone if a DHW
tank is NOT already connected to the boiler. See Advanced Manual
to configure Boiler Pump to run during DHW demands and change
TARGET MOD SENSOR to System Supply.
3. Priority of DHW/Space Heating:
a. DHW Priority – DHW is priority over space heating. Use Priority
1 for DHW; Priorities 2 and/or 3 for space heating. The control
will not run multiple priorities simultaneously.
b. Space Heating Priority – Space heating is priority over DHW. Use
Priorities 1 and/or 2 for space heating; Priority 3 for DHW. The
control will not run multiple priorities simultaneously.
c. No Priorities – Space heating and DHW can occur simultane-
ously. Use only if DHW is a zone in system. Assign DHW and
Space heating to same Priority. Do not use outdoor reset for this
application.
Controlling the circulators
1. The control can control up to four circulators (boiler circulator and three
others). Refer to Field wiring, beginning on page 47, for instructions on
wiring to circulators.
2. The factory default settings are: all three inputs are set up for Space Heat-
ing (
Priority 2)
. Each input correlates to its respective circulator output.
For DHW applications, assign DHW inputs to determined Priority
(1, 2 or 3). Priority 1 is defaulted to DHW for DHW
Priority ap-
plications.
3. For more than 3-zones, use Weil-McLain WMZV zone valve controller.
Connect zone valve end switches to a
Space Heating
Priority input, (default Priority 2) to use default settings.
Connect system circulator to corresponding output.
Use isolation relays if connecting 3-wire zone valve
end switches to the inputs.