¶ INSTALLATION OF ACCESSORIES AND DUCTWORK
¶ INSTALLATION OF THE MIXING ASSEMBLY
This section applies to the mixing assembly for the water heater and water cooler.
The installation and service manual is included in the mixing assembly packaging.
This manual contains the necessary information for safe installation, commissioning and maintenance.
If the unit is installed outdoors, it is recommended to place the mixing assembly in a free chamber downstream of the heat exchanger. This must be taken into account when designing the unit, and the free space must therefore be part of the heat exchanger chamber or provided as a separate chamber.
An example of installing the mixing assembly inside the chamber is shown in the following figure.
¶ INSTALLATION OF SIPHONS
Condensate drain pans (cooler and heat recovery chambers) are fitted with DN32 outlets. The supplied siphons are sized for this dimension.
The designation of the siphon connection to the pan outlet is shown in the following figure.
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| Condensate outlet of the plate heat recovery unit. | Condensate outlet of the cooler (water cooler/evaporator). |
All condensate drains must be connected via a siphon with a sufficient water column height to ensure faultless operation.
A separate siphon must be connected to each outlet. The pipework downstream of the siphon may be connected to the outlet of another siphon.
A siphon connected on the negative-pressure side must always be filled with water before commissioning and after a longer shutdown so that the condensate can drain away.
The pipework downstream of the siphon must not discharge directly into the sewer pipework.
The height of the unit above floor/ground level must always be adapted to the required siphon height (base frame, feet, steel frame, etc.).
If the siphon is installed outdoors, its route must be heated, for example using an electric heating cable.
If the heating cable is part of the delivery, a 2 m long heating cable with an integrated thermostat and plug, together with an outdoor socket, is supplied. The measurement and regulation system only includes a residual-current device for the outdoor socket. The cable is controlled autonomously by its integrated thermostat. It usually switches on at +3 °C and switches off when the temperature rises above +10 °C. The measurement and regulation system therefore does not control the heating cable.
Siphons are distinguished according to the pressure condition at the outlet within the unit configuration – this may be negative pressure or positive pressure. Depending on the type of pressure condition, a negative-pressure or positive-pressure siphon is supplied.
If the siphon is part of the delivery, its correct position can be determined according to its type (HL136NGG/HL136.2), which corresponds to the siphon type specified in the unit’s technical documentation in the section for the relevant built-in component (cooler, evaporator, heat recovery unit, etc.).
In other cases (customer’s own delivery), the type of pressure condition and the correct siphon type can be determined from the data in the attached technical documentation of the unit in the section for the relevant built-in component, where the type of pressure condition (positive pressure/negative pressure) and its value in [Pa] are stated. The pressure value is calculated on the basis of the local pressure losses of the relevant part of the unit, including the external pressure loss. The external pressure loss is divided into the suction and discharge sides relative to the fan already during the design and technical approval of the unit. However, the specific installation must always be taken into account, and, if necessary, a new distribution of the external pressure loss must be determined, thereby setting the siphon height correctly.
Furthermore, when determining the pressure condition at the siphon location, it is possible to use, for example, the unit figure in the attached technical documentation as a guide. The following figures show examples of how to determine the pressure condition.
The correct siphon height setting according to the pressure value is as follows:
1) Negative-pressure siphon with ball HL136NGG
Can be used for negative pressure up to 2300 Pa.
Can also be used for positive pressure up to 500 Pa.
2) Transparent positive-pressure siphon HL136.2
Can be used for positive pressure up to 2000 Pa.
A DN40 to DN32 reducer for connection to the condensate drain is supplied with the siphon as standard.
¶ CONNECTING THE UNIT TO THE AIR DUCT
The unit may be connected to the air duct only using flexible connectors fitted to each end flange of the unit chamber (they prevent vibration transmission).
The air duct must be connected without stress, i.e. so that its weight does not load the flexible connector and therefore the chamber or the unit.
The flange connection between the air duct and the flexible connector must always be properly sealed.
When connecting the air duct, the following permissible installation limits of the unit’s flexible connector must be observed:
| 1) Standard flexible connector: | 2) Riveted flexible connector (painted): |
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| Optimum installation length = 135 mm. | Optimum installation length = 130 mm. |
¶ INSTALLATION OF ACTUATORS
Based on the requirement at the time of ordering, actuators may be fitted at the factory, including electrical connection to the cable junction box. In other cases, their recommended installation is described in the following points.
All dampers are fitted at the factory as standard with sheet-metal brackets for attaching the actuator.
The dampers may be:
• End-wall damper – external (on the chamber flange)/internal
• Damper-section damper – external (on the chamber flange/on the walls)/internal
• Vertical/horizontal bypass damper of the plate heat recovery unit – internal
• Bypass damper of the Pecín gas heater – internal
• Bypass damper of the Monzun gas heater – internal
The recommended actuator installation is as follows:
(further information on actuator installation and electrical connection can be found in the manufacturer’s instructions included in the packaging):
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Adjustment of the actuator bracket
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Actuator attachment
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Setting the actuator stops
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Installation of the cable junction box
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Testing the actuator for free movement and direction of rotation
¶ WIRING THE CHAMBER LIGHTING SWITCH
Chambers equipped with internal lighting are fitted at the factory as standard with a switch wired according to the following diagram:
