10
11 - Technical appendix
10 - Maintenance
The units are designed to operate for long periods of time with a minimum of maintenance. However, the following operations must be
performed regularly.
Component
Maintenance operation
Recommended frequency
Air filter
1 - Clean with a vacuum cleaner or tap gently then
Every month or more
wash in warm water (40°C) with a mild detergent.
often if necessary.
2 - Rinse and dry before replacing on unit.
3 - Never use petrol, alcohol or any other chemical
product.
Unit casing
1 - Remove dust from the front panel with a soft duster
Every month or more
or wipe a damp cloth with a mild soap solution.
often if necessary.
2 - Never use petrol, alcohol or any other chemical
product.
Drain pan and
1 - Clean and check for obstructions.
Each season before start up.
evacuation piping
Indoor / outdoor coils
1 - Check condition and remove dust from between
Each season before start up.
coil fins.
Compressor
1 - No maintenance required.
A L L O T H E R SERVICE AND MAINTENANCE OPERATIONS MUST BE PERFORMED BY TRAINED
AND QUALIFIED PERSONNEL APPROVED BY THE SUPPLIER
Unit Capacity
Total cooling capacity can be determined by using correction fac-
tors C1, C2 and C3.
Given cooling capacity = Cooling capacity at standard rating
conditions x C1 x C2 x C3.
C1 = Capacity correction factor for temperature
C2 = Capacity correction for piping length
C3 = Capacity correction for indoor unit fan speed
Capacity correction factor for temperature (C1)
*
Conditions applicable for the "Low ambient line" / +19°C for the "Export
line".
Correction factors (C1) determine the instantaneous capacity (which
does not take account of defrosting on heat pump units). T h e s e
capacities may vary slightly, depending on the size of the unit.
Cooling capacity correction factor
Indoor temp.
Outdoor temp. °C DB
°C WB
19
25
30
35
40
46
23
-
1.20
1.15
1.11
1.06
1
19
1.10
1.08
1.04
1
0.96
0.90
14
0.88
0.86
0.84
0.82
0.79
0.74
Heating capacity correction factor
Indoor temp.
Outdoor temp. °C WB
°C DB
14
10
6
0
-8
23
1.20
1.04
0.96
0.77
0.58
20
1.25
1.10
1
0.80
0.69
17
1.30
1.13
1.04
0.83
0.63
Maximum
Minimum
Cooling mode
+46°C
0°C
(-10 with fan stoppage)
Heating mode
+28°C
-10°C
(heat pump mode)
Unité intérieure
Fan speed
High
Medium
Low
Correction factor C3
1
0.90
0.75
Capacity correction factor for indoor fan speed (C3)
Capacity correction factor for piping length (C2)
Operating temperature limits
Indoor unit
Piping length (m)
7.5
10
Correction factor C2
1
0.98
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