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1002594 ISSUE 1 M172 VARIHEAT
FEATURES OF THE VARIHEAT RANGE
The Variheat range consists of four models: 600, 900, 1200 and 1500. This
manual covers the Variheat AW models, all purpose designed and built for
swimming pool use, to provide heat pump dehumidification, heat recovery
and optional fresh air ventilation. The recirculated air flow increases across the
range, from 2000m³/h for an AW600 to 4300m³/h for an AW1500. All Variheat
models are supplied as packaged air handling units with an integral control
system and a 3.5" touchscreen controller.
Variheat AW models offer the following features and functions:
Robust chassis and construction specifically designed for a swimming pool
environment
Ventilation of the pool hall by main supply fan
Optional fresh air module for automatically regulated introduction of fresh
air using a dedicated exhaust fan and damper, set to provide a pool hall
negative pressure
Heat pump dehumidifier incorporating heat recovery to pool water and
pool hall air
Integral control system complete with PLC, sensors and 3.5" colour
touchscreen, providing automatic control of:
– Humidity
–
Air temperature
–
Pool water temperature
Comprehensive configuration, operation and fault status
Fully controlled LPHW air heater battery
Fully controlled LPHW pool water heat exchanger
Air filtration
Optional features
For duct connections, pool water and LPHW pipework positions and sizes,
please refer to drawings elsewhere in this manual.
The Variheat range can be supplied with many air outlet configurations,
see configuration drawings for versions available. Spigots are provided for
connection to ductwork. Versions with a bottom outlet main supply fan include
an adapter to facilitate connection to floor ducting.
All Variheat AW models contain a heat recovery heat pump dehumidifier that is
automatically controlled to remove unwanted humidity from the swimming pool
hall and provide swimming pool water heating. Heat recovery from the heat
pump is usually sufficient to supply the majority of the evaporation heat losses
from the main pool water. The heat recovery will also contribute significantly
towards the hall heating requirements. The system is optimised for a swimming
pool environment and will provide efficiencies upwards of 250%.
All Variheat models have a main recirculating fan and is ready for connection to
supply air ducting and return air ducting. All models use efficient, direct drive
fans, either constant flow or EC speed controlled.
The optional fresh air module includes an additional, smaller, exhaust air fan,
with dampers and is ready for connection to exhaust and fresh air ducting.
The optional negative pressure module includes the exhaust fan and dampers
only, for installations where the make-up fresh air is introduced by other means.
All Variheat AW models are fitted with a fully controlled air heater and pool
water heater when connected to a low pressure hot water (LPHW) system.
The output of the standard heat exchangers are rated at an LPHW flow
temperature of 80°C (see data sheet on page 56.). As an option, all Variheat
models can be factory fitted with a larger air heater to provide the same output
at 60°C as the standard air heater has at 80°C, to be used with renewable
technology heat sources and condensing boilers that provide lower LPHW flow
temperatures. Provision is made for the LPHW heat source to be initiated by
the Variheat control system. The LPHW heat source is not included.
The optional electric air heater module includes air heating elements, with
heating capacities ranging from 6kW to 18kW depending on model, in lieu of
the normal air and pool LPHW heaters.
All Variheat AW models are fitted with pairs of “volt free” terminals that provide
an interface for pool pump, heat source and setback control, as well as remote
monitoring/control of the unit. See section 3.8 Volt free terminals and remote
access for a full list of these terminals.
Summary of Contents for Variheat AW600
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