Code Description; Mechanical Installation; Unit Access - NuAire xboxer xbx+ Installation Manual

Installation Manual

2.1 Code Description

1 2 3 4 5 - 6 7 8
C H - L H
XB 10 A
1. Range: XB = XBOXER
XP = Passivhaus-Certified
2. HX Type C = Counterflow
E = Enthalpy*
3. Unit Size: 10, 15, 25, 45, 55, 65
4. Unit Layout: H = Horizontal
5. Filter Grade: A = G4 Supply & Extract Panel Filters
6. Heating Type: E = Electric
L = LPHW
N = No Heating
7. Heater Size: H = High Duty
L = Low Duty
N = No Duty
8. LPHW Valve Type: 4 = 4 Port Valve (3 way with bypass)
N = No Valve
9. Control Type: C = Ecosmart Connect Control
10. Constant Pressure - = Not Available
Controls: P = Constant Pressure
11. Controls Handing: L = Left Hand
R = Right Hand
12. Filter Access: B = Bottom Access
S = Side Access
13. Unit Finish: 1 = Standard
4 = Coastal
14. Unit Roof: S = Standard Unit (No Roof)
W = Twin Pitched Roof (Factory Fitted)
*Enthalpy variants do not include a condensate pump or
condensate connections and can be installed in a vertical
orientation. It is important to ensure that safe access is available
to the control, filters and other accessible parts. Bottom access
units are highly recommended for this type of application. Contact
Nuaire for advice.
** This units coastal finish has been designed to withstand an
External C4 Atmospheric Corrosivity Category as per BS EN ISO
12944-2:2017 providing that it is installed and maintained as per
the manufacturer's instructions and general Warranty Guidance
Notes found in our conditions of sale.

3.0 MECHANICAL INSTALLATION

Installation must be completed by competent persons, in
accordance with good industry practice and should conform to all
governing and statutory bodies i.e. IEE, CIBSE, etc.

3.1 Unit Access

In this product range, several unique concepts have been
implemented with a view to simplifying the installation design.
Nuaire recommend as best practice guidance, to allow for
a minimum of around 600mm clearance. Whilst an absolute
minimum access of 250mm is possible, access in this situation
is difficult and does not allow for major maintenance including
component replacement.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
- 9 10 11 12 13
- P S
4 C L 1
(Size 55 & 65 only)
(XBC units only. Spare included)
F7 Supply & G4 Extract
(XPC units only. Spare included)
(C4**)
XBC+ Ecosmart Connect (C) Control
1. The unit configuration is such that the supply and discharge
connections are positioned at the centre. The corresponding
Intake and Extract connections may be positioned on either
14
side of the unit, allowing greater flexibility in the layout of
S
ductwork in the space, (Figure 4) with the blanking panel re-
positioned to suit.
2. The right handed horizontal unit configuration is shown in
Figure 6. With the light handed horizontal unit configuration
shown in Figure 5.
3. With absolute minimum clearance, the unit may be connected
to the power supply and control connections since the control
may be rotated by 90 degrees to face downwards. (Cable
connections must allow for the relative movement when the
control is re-positioned).Filters may be changed and the fans
coils, heat exchanger and condensate tray may be inspected
and cleaned if necessary.
4. The LPHW and Electrical heater settings, coil bleed and drain,
and all other control adjustments are similarly accessible
(Figure 1).
5. Side access, where possible, is preferred in all cases in terms
of safe working access to the equipment under the CDM
regulations.
6. Where these arrangements are not suitable, the Consultant's
and Contractor's project specific requirements will always be
accommodated where possible.
7. Bottom access only units (Example code: XBC25HA-LH2-
EPLB1S), provide access to filters only (Figure 7). Remove the
filter covers on the front panel of the unit by gripping the two
circular tabs either end of the filter covers and pulling away
from the unit. The filter can now be extracted. Once the filters
have been inspected return or replace them as necessary.
Filter removal is not available from the sides for bottom access
units. Bottom access units must be installed with the following
minimum clearance below the units. XBC15 = 225mm, XBC25 =
300mm,
XBC45 = 360mm, XBC55 = 480mm and XBC65 = 630mm.
Unit is shipped with 4x G4 filters in place, 2 of which are included
as spares. For higher grade replacement filters contact Nuaire.
Pressure drops will vary with filter grade and this change in
pressure must be accounted for when commissioning.
Unlocking an access panel is achieved by inserting a flat head
screwdriver into the locking latch groove and turning anti-
clockwise (1/4 turn), keys are neither required nor provided.
2
Minimum Controls Clearance (Side Access Unit)
14. 11. 23. Document Number 672068
Filter removal from
internal frame
Access covers
on control side
of fan unit
Hinged Ecosmart
& basic control
box rotates 90
o
to assist with
commissioning.
250mm clearance for access
3