Table of Contents
Advertisement
The water heater must be filled with water
before switching on the immersion heater. Failure
!
to do so will damage the element and void any
guarantee on the product.
Figure 5: Wiring diagram for Immersion Heater
6.6
Air Connection
The heat pump operates over a large air temperature
range (from -7°C to 35°C) using energy from outdoor
air. It is essential to correctly design and install the air
ducting system to ensure the product operates properly
and complies with regulations.
Figure 6: Air intake and Air discharge
The air supply to and from the Edel heat pump water
heater must NOT extract air from the living space of the
dwelling. The air must be supplied to the appliance di-
rectly from the outside or from another source outside
the thermal envelop of the living space.
The ducting used to connect the air intake and exhaust
must be sufficiently insulated to prevent condensation
forming. Condensation may result in damage to the ap-
pliance and/or building fabric.
Dimplex does not take any responsibil-
ity for issues caused by poor ducting
design or installation.
Figure 7 provides an example of how the ducting inlet
and outlet connections should be installed.
Figure 7: Examples of air connection to the water heater
Dial to adjust
water temperature
6.7
Earth (green/yellow)
Live (brown)
It is essential to maintain a minimum air flow rate
Neutral (blue)
through the ducting for correct operation of the appli-
ance. The nominal mass flow rate must be maintained
above 320m
For the fan to operate in Fan speed 1, the maximum sys-
tem pressure drop across the ducting connections must
not exceed 100Pa and for Fan speed 2 the maximum
pressure drop must not exceed 220Pa
6.7.1 Worked Example
A ducting system with the following;
Installation
Dimplex does not take responsibility
for installation and the operating effi-
ciency of the appliance when installed
outside the scope of the guidelines
provided in this document.
Ducting Design
/hr.
3
Fan speed 1 will operate when the
system pressure drop is minimal as a
result of very short duct runs. System
efficiency will be slightly increased and
the noise level slightly reduced.
NOTE: The system reliability and efficiency will be
compromised should the mass air flow rate
drop below 320m
During the product specification stage, it is essential that
the system designer calculated the required total
quantity of ducting connections, lengths, bends and
terminations to establish an accurate value for total
system pressure drop based on the system air flow
Item
Air Intake
2m straight
90°bend
External terminal
Air Exhaust
2m straight
90°bend
External terminal
Total System Calculated Pressure Drop @ 320m3/
hr
Table 3: Worked example
Note:
-The calculated worked example includes all the
necessary ducting components to complete the
installation and has resulted in a total system
pressure drop of 207.7 Pa at 320m
flow rate. This is acceptable as the pressure drop
is below the maximum permissible allowed.
- The pressure drop information provided is for
160mm semi rigid Ubbink ducting, other ducting
manufacturers components may be used howev-
er the total maximum pressure drop must not ex-
ceed the stated values.
/hr.
3
Qty
∆P [Pa]
Total [Pa]
X 5
4.8
24.0
X 3
12.5
37.5
X 1
51.0
51.0
X 4
4.8
19.2
X 2
12.5
25.0
X 1
51.0
51.0
207.7 Pa
/hr mass air
3
10
Advertisement
Table of Contents
