7
®
Heat
Link
www.heatlink.com
HEP025RT
Installation, Operation, and Maintenance Manual
L6HEP025RT
#
Components
Component Description
Part Number (Qty.)
HEP025RT
1
Single wall, brazed-plate heat
exchanger
The heat exchanger provides separation of the
primary and secondary loops.
n/a
2
Primary pump
The pump moves the heated fluid through the
hydronic system when there is a call for heat
from the thermostat. Factory set to 3rd speed.
See pump curves below.
PUMP1558
3
Secondary pump
PUMP1558
4
Electrical box
Houses relays and wiring.
n/a
5
Timer
Circulates fluid for 15 minutes every 24 hours.
n/a
6
Terminal block
Provides easy access wiring for thermostats, flow
switch (opt.), and aux. contacts.
n/a
7
24Vac 20VA plug-in transformer
Provides power to the panel electronics.
PLINTR20VA
8
½" Safety relief valve
For pressure relief only. Furnished without a lever.
1/2" female drain. Pressure range 75-175psi (5.17-
12.06 bar). Setting 50, 75, 125 and 150psi (3.45,
5.17, 8.61 and 10.34 bar).
This protects the system from thermal expansion
pressure buildup during times when reducing
valve thermal expansion bypass is ineffective due
to high inlet water pressure.
n/a
9
Pressure gauge
The rear connection pressure gauge reads the
secondary loop pressure. May not be exactly as
shown.
Range: 0-60psi
n/a
10
Automatic air vent
Automatic air vent purges air trapped in the
secondary loop. May not be exactly as shown.
79932
11
Drain and fill valve
Access point for filling and draining the panel.
n/a
12
Optional flow switch
The electronic flow indicator provides DHW
priority when the DHW flow rate reaches a factor
pre-set level (approx. 0.5 US gpm). Must be
piped in downstream of panel.
FLWSWTCH
13
Accessory pack
Panel installation accessories.*
n/a
i Mounting screw
Panel mounting screws.
(×4)
ii ¾" Nitrile washer
Washers for installation of adapters, plus (4)
spares.
NTRWSH34 (×10)
iii ¾" MBSP × ¾" FNPT adapters Adapters for expansion tank, and pressure relief
piping.
(×2)
iv ¾" isolation valve
Zone valve used to isolate the panel from the
system during fill & purge, and maintenance.
(×4)
14
Optional cover
Powder coated cover
PC2319CVR
*Contact your HeatLink representative if the accessory pack is missing in whole or in part.
Panel Components
