Calorex Variheat AA1200, Owners & Installation Manual

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1002595 ISSUE 5 M172 VARIHEAT
FEATURES OF THE VARIHEAT RANGE
The Variheat range consists of four models: 600, 900, 1200 and 1500. This
manual covers the Variheat AA 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 AA600 to 4300m³/h for an AA1500. All Variheat models
are supplied as packaged air handling units with an integral control system and
a 3.5" touchscreen controller.
Variheat AA models offer the following features and functions:
y
Robust chassis and construction specifically designed for a swimming pool
environment
y
Ventilation of the pool hall by main supply fan
y
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
y
Heat pump dehumidifier incorporating heat recovery
y
Integral control system complete with PLC, sensors and 3.5" colour
touchscreen, providing automatic control of:
– Humidity
–
Air temperature
y
Comprehensive configuration, operation and fault status
y
Fully controlled LPHW air heater battery (AA+LPHW models only)
y
Air filtration
y
Optional features
For duct connections 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 AA models contain a heat recovery heat pump dehumidifier that
is automatically controlled to remove unwanted humidity from the swimming
pool hall. The heat recovery will 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 AA+LPHW models are fitted with a fully controlled air heater when
connected to a low pressure hot water (LPHW) system. The output of the
standard heat exchanger is rated at an LPHW flow temperature of 80°C (see
data sheet on page 54. 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 LPHW air heater.
All Variheat AA models are fitted with pairs of “volt free” terminals that provide
an interface for heat source and setback control, as well as remote monitoring/
control of the unit. See section 3.6 Volt free terminals and remote access for a
full list of these terminals.