Installation Manual 5.1.2
17
8.0 Condensate Considerations
Make provision for a condensate drain connection.
Some installations require a condensate pump to take
the condensate to a suitable drain. All Hydro-Temp
systems have a negative pressure on the condensate
drain so a P-trap is required on all systems. A vent is
only necessary if possible double p-trap conditions
apply. Double p-trap is commonly caused by un-level
drain piping that allows standing water to create a
second p-trap condition. If the system has two or more
p-traps an “air lock” will occur and the system will not
drain. The vent should only be installed downstream of
the p-trap at the unit. Never install a vent between the
unit and the p-trap as this will negate the purpose of
the p-trap. It’s common practice to install extra tees
near the Hydro-Temp system to allow access for
pouring drain cleaner down the condensate drain,
insure all extra openings are capped off or are plugged.
Never run the condensate drain in to the same
line as the discharge water of a well water system.
If the discharge were to become clogged the back
pressure would backup through the condensate and
cause severe water damage.
9.0 Low & High voltage Connections
Always use caution when working with or
around electrical wiring or connections!
When running high and low voltage wire
into electrical box always leave enough slack to swing
out or remove the electrical box. The electrical box can
be swung out by removing one screw from the bottom
of the box. Then if desired the box can be lifted out for
easy servicing behind box. This only works if slack is left
in the field wiring.
The controller is mounted on a Swing out panel that
hinges out to provide access behind the panel. Some
terminal strips or electrical components are normally
located behind the controller swing out panel.
9.1 Main system Power
Size all wire in accordance to local electrical code. Main
power will land on the top of the large distribution
block in the electrical box labeled L1 & L2. An additional
L3 terminal will be provided for 3 phase equipment. A
green ground lug will also be provided for the ground
wire.
9.2 Pump outputs
A terminal strip will be provide for each pump output
that applies. Each will be labeled as needed. Examples
are:
• DHW Priority 230Vac
• AHW Priority 230Vac
• Pool Priority 230Vac
• Infloor Priority 230Vac
9.3 Master Switch
On systems with controllers an exterior master switch is
located on the front right corner of the unit. The
purpose of the switch is to disable the unit from running
without turning off the power.
Caution MUST be taken when opening the unit
for service work as the master switch does not
disconnect power. The unit is still powered with the
master switch off. This switch is useful when needing to
shut down the system for filter replacement or system
operation is not needed but thermostats are to remain
powered. Cycling the master switch will also reset any
system lockouts.
If needed, other items such as a condensate drain pan
float or building automation on/off switch could be
wired in series with the master switch for system
control. The master switch is normally closed from
input to ground, it opens to shut down the system.
9.4 Temp Sensor
A terminal strip will be provided for all field mounted
temperature sensors. Example of labeling would be:
• DHW Tank Temp
• AHW Tank Temp
• Pool Temp
• Infloor Temp
9.5 Belimo motorized valve (Open loop or well water)
As mentioned in section 7.2 a belimo on/off valve is
used on all well water systems to start and stop the
water flow. These may be shipped with the unit and
require field installation and wiring. If field wiring is
required a terminal strip labeled Belimo valve will be
provided. This is a 3 wire connection including
common, power open and power close.
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