Ductwork Connection; Condensate Drain Connection; Connecting Hot-Water Heating Coil To A Heating Water Supply - Airflow Duplexvent MULTI-N Instruction Manual

2.8.

Ductwork connection

●
Connect the ductwork according to the design documentation
●
Straight ductwork being at least 1m long must be always firmly connected to all ports. This will
ensure that an equal air speed profile is achieved throughout the whole port's cross-section area.
The rule does not apply on the intake of supply air e1 when droplet eliminator with hood is fitted
here.
●
A duct of min. length of 2m must be always connected to the fan outlet to prevent injury caused by
the fan's impeller. This duct must be connected in such a way that it can be dismantled only by
using tools.
●
If there is a risk of short-circuit between the exhaust of stale air i2 (EHA) and intake of fresh air e1
(ODA) a duct being at least 3 m long must be connected to the outlet port i2. This applies to semi-
compact units 10000 and 11000 Multi-N, 7500 and 9000 MultiEco-N, 12100 and 15100 Basic-N.
2.9.

Condensate drain connection

●
Connect a pipe to the condensate drain outlet KV and lead through the condensate heating cable
HC. Shape a pipe to form a trap with dimensions stated below. Sufficiently fix the trap's shape.
●
Connect a pipe of the same or larger diameter to the trap and connect this to a sewer.
●
Adjust the length of the heating cable HC so that it heats the connected duct up to the place where
the drained condensate will not freeze.
●
Check the pipe's slope and make sure the whole pipe run (including inside the equipment) is free of
foreign materials.
●
Fill the trap with water.
Δp - maximum positive / negative working pressure in the compartment of the unit. The height of trap
h = 15-20cm is sufficient for the vast majority of installations.
Each condensate drain must be connected to its own trap.
The number of condensate drains depends on the unit's configuration.
2.10.

Connecting hot-water heating coil to a heating water supply

During the installation of water heating coil follow the guide that is enclosed to this optional accessory.
When connecting the water heating coil follow the instructions below:
●
Maximum heating medium temperature allowed is 110 °C. The max. operating pressure is 1.0
MPa.
●
To ensure correct performance of the heating coil
hydraulic kit, fit the system with a pump with sufficient
performance that covers the entire pressure drop. The
pump supplied with the hydraulic kit is designed to cover
pressure drop of the water heating coil only!
●
If no shutoff damper on outdoor air intake (e1) is fitted
on the equipment put a tight shutoff damper in the
outside air inlet duct (we recommend a type with a
spring return actuator, closing on power interruption).
●
Water heating system in outdoor units Multi-N, MultiEco-
N and Basic-N must be protected by an antifreeze with
sufficient thermal resistance.
●
Fit a strainer in the equipment heating system inlet pipe.
∆
ℎ = + 50 [ ]
10
1
∆
ℎ = + 50 [
2 ∙ 10
∆
ℎ = 1,5 + 100 [
10
A: frost thermostat; B: drain valve; C: drain
valve; D: mixing valve; E: actuator; F: ball
valve; G, pump L, short-circuit bypass
]
]
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