TriangleTube PRESTIGE Solo PA 110, Installation & Maintenance Manual

Page: 49 / 112

37
CHAPTER
8
CHAPTER 8 - EXTERNAL WIRING
8.7. Outdoor Sensor Wiring
The Outdoor Reset function and Warm Weather Shut-
down (WWSD) features require the connection of the
included outdoor temperature sensor. See
Chapter 12
on page 63 for outdoor sensor installation and setup.
8.8. Domestic Hot Water Wiring
The Domestic Hot Water terminals can accept either a
call from an aquastat (thermostat) or temperature sen-
sor. Use of the included indirect water heater sensor is
recommended.
1. Connect the DHW aquastat or temperature sensor
wires to low voltage terminals X4-1&2 located at the
bottom of the ACVMax control module as shown in
Fig. 23 on page 36 .
8.9. Additional Boiler Limits
Additional boiler limits (High Temperature Limit, LWCO,
etc.) can be wired into either the Manual Reset Limit or
Auto Reset Limit terminals of the PRESTIGE Solo. These
limit connections will provide a “hard” lockout requiring
a manual reset of the PRESTIGE Solo or a “soft” lockout in
which the PRESTIGE Solo will automatically reset when
the limit resets.
A Manual Reset External Limit Open (E87) lockout will
occur anytime the manual reset terminals are open. An
Auto Reset External Limit Open (76) lockout will not oc-
cur until just before ignition when the auto reset termi-
nals are open. The Auto Reset terminals should be used
for any type of burner interlock such as a combustion
air louver or water flow proving switch.
• The Manual Reset Limit and Auto Reset
Limit terminals are located on the lower
right corner of the ACVMax control module
housing.
• Manual Reset Limit and Auto Reset Limit
connections to the PRESTIGE Solo require a
dry contact with no external voltage pres-
ent. Ensure no external voltage is present
on each set of wires before connecting to
the PRESTIGE Solo. If external voltage is
present, the use of an isolation relay is re-
quired to prevent damage to the ACVMax
controller.
NOTICE
1. Remove the factory-installed brown jumper wire at
the Manual Reset Limit terminals that will accept
the additional boiler limit.
2. Remove the factory-installed orange jumper wire at
the Auto Reset Limit terminals that will accept the
additional boiler limit.
3. Connect the external limit wires to the Manual Re-
set Limit or Auto Reset Limit low voltage terminals
located on the lower right corner of the ACVMax
control module housing as shown in
Fig. 23 on
page 36.
8.10. External Modulation Control
The PRESTIGE Solo firing rate can be controlled by an
external modulating boiler controller. See
Chapter 13
on page 65 for external modulation signal wiring and
setup.
8.11. System Sensor Wiring
An optional system temperature sensor can be placed
on the central heating loop to control the temperature
in the central heating loop instead of the boiler loop.
When connected, the PRESTIGE Solo will automatical-
ly modulate to maintain the target temperature in the
central heating loop. The boiler supply temperature
sensor will continue to be used as a high temperature
limit.
Locate the system temperature sensor
where it can accurately measure the supply
temperature to the heating system. Inaccu-
rate system temperature readings could lead
to overheating or under heating resulting in
property damage.
1. Connect the system temperature sensor wires to
low voltage terminals X5-3&4 located at the bot-
tom of the ACVMax control module as shown in
Fig. 23 on page 36.
CAUTION