Outdoor Reset Control - Weil-McLain GOLD GV 3 Series Manual

IIIh
Water piping —
Figure 14a
12"
max
Figure 14b Auto return temp regulation;
12"
max
34
GOLD GV Water boiler series 3 — manual GOLD GV Water boiler series 3 — manual GOLD GV Water boiler series 3 — manual
GOLD GV Water boiler series 3 — manual GOLD GV Water boiler series 3 — manual
Manual bypass; fixed temp
operation only
Zone 2
Zone 1
Cold
water
fill
GV Boiler
outdoor reset or fixed temp
Zone 2
Zone 1
Cold
water
fill
GV Boiler
85018b
multi-zone radiant system
Multi-zone radiant heating
system piping
Multi-zone systems require automatic regulation of the
system supply temperature because of widely varying
load conditions. Figure 14a (zone-valve zoning) and
Figure 14b (circulator zoning) show suggested piping
for these systems.
Select an automatic temperature control valve or motor-
operated valve which can be adjusted for the desired
supply water temperature.
Zone-valve zoning — The suggested piping uses a separate
circulator for system circulation to provide the higher
flow typical of radiant heating systems and to assure
good temperature distribution in the system when the
return water temperature is low.
Circulator zoning — The GV internal circulators must
not be removed. Provide a separate circulator for each
zone.

Outdoor reset control

Apply Figure 14a or 14b for any system intended for
85015b
outdoor reset of the supply water temperature. Use a
motor-operated three-way valve and an outdoor reset
temperature control system.
Legend
1 Boiler isolation valves
2 Automatic air vent (with diaphragm-type
expansion tank), or connect to tank fitting
(closed-type expansion tank).
3 Diaphragm- or bladder-type expansion tank, if
used (For closed-type expansion tank, pipe
from top of air separator to tank fitting as in
Figure 10.)
4 Zone valve
5 System or zone circulator
6 Flow/check valve
7 Hose bibb purge valve
8 Boiler pressure/temperature gauge
System supply temperature gauge
9
10 Boiler return temperature gauge
13 Supply temperature automatic mixing valve
Part number 550-141-850/0699