THERMO 2000 VENTUM, Installation And Operation Manual, Page: 12 / 34

VENTUM HYDRONIC AIR-HANDLER Installation and Operation Manual (Revised: June 2021)
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Table 6 : Legend of installation examples
No. Description
1 Automatic air eliminator
2 Ball valve
3 Boiler
4 Expansion tank
5 Union (dielectric if required)
6 Pressure reducer
7 Non-return valve
8 Domestic cold-water inlet
9 Primary network circulating pump
10 Circulating pump for the radiant floor network (secondary)
11 Thermostatic valve
12 Radiant floor network
13 Air supply plenum
14 Positioning of the air outlet temperature sensor
15 Air-conditioning coil
16 A/C coil drain pan
17 Drain valve for the heating coil
18 Return air plenum
19 Filter and filter holder
20 Instantaneous water heater
21 Check valve
22 Positioning of air inlet sensor if cooling coil is located before the VenTum unit
Blower
The direct drive blower present in the VenTum is
variable speed adjustable through the controller (see
Section 4). The ECM-type motor provides constant
airflow while consuming less energy than fixed-speed
PSC-type motors.
When there is a request for heating, air-conditioning
or continuous ventilation from the thermostat, the fan
will start depending on the configuration made.
Filter
The device has a removable filter holder which must
be installed at the fresh air inlet
. Do not install the
filter at the hot air outlet. If an air-conditioning coil
is installed in the fresh air return of the fan coil, the
filter must be installed before it.
It is recommended to clean the filter every month and
replace it every 3 months of use of the unit or
according to the recommendations of the filter
manufacturer.
A filter that is too dirty can cause the air-conditioning
coil to freeze, a lack of comfort in the air-conditioning
space as well as high ventilation noise.
Pump / check valve
The pump integrated into the hydronic air-handler is
a pump with volute in composite material certified
NSF 61 for use with drinking water. The pump
provides circulation for at least 1 minute every 6
hours to prevent water from becoming stagnant in
the heating coil.
By default, the pump speed is factory set to “Hi”.
This can be adjusted to a lower speed directly on the
pump motor head as needed.
ELECTRICAL CONNECTIONS
Hydronic air-handler power supply
Hydronic air-handler wiring and grounding must
comply with the National Electrical Code and local
code. The latter takes precedence.
The power supply is via a 2-wire L1-N conductor with
ground. Simply connect the power supply wires to the
L1-N terminal block of the VenTum and attach the
ground to the ground terminal block.
Figure 8 shows the electrical diagram of the VenTum.
The main power supply of the hydronic air-handler
must be 120VAC/1PH/60Hz.