HVC NCA Series User manual

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Operation and maintenance manual
NCA Series 400H hand operated single blade leakage rated fire damper
Regular inspection and maintenance of fire dampers is essential to
ensure they remain in good working condition. It is the system owner’s
responsibility to ensure this is carried out.
In accordance with EN 15650:2010 fire damper maintenance routines,
such as that given below, must be carried out at intervals not exceeding 6
months.
Some automatic systems may allow more frequent testing (48 hours or
less) and this may be required by national regulation.
Please note: This document is relevant only to hand operated S400
dampers. For S400 dampers equipped with an actuator
please see the relevant document.
Installation guide: NCA Series 400 hand operated single blade leakage rated fire damper
Operation and maintenance manual
Page 1 of 3 - Issue A - 03/03/2022
Damper type: NCA Series 400H hand operated single blade leakage rated fire damper
Thermal link rated temperature:
Delete as appropriate 68°C (red bulb in link) or 93°C (green bulb in link)
Damper reference (if applicable):
Damper location (within site):
Date of inspection:
Step Operation Notes Yes/No
1Is the damper open? The damper handle should be parallel with the damper body, indicating the
damper is open
2Is the handle mechanism secure and
undamaged?
Using a pozi-drive screwdriver, ensure the machine screw inside the spindle
cap is secure
3Remove access door/s to access the inside of
ductwork and damper blade
Both sides of the damper blade should be easily accessible N/A
4Is the damper blade in the fully open position
and secure?
The damper blade should be in the fully open position.
Gently try to move the blade by hand, it should not rotate.
5Is the damper blade unobstructed? Ensure there is nothing present which is obstructing or could obstruct the
damper blade operating
6Is the thermal link clean and free from
damage and corrosion?
Thermal links must be cleaned with care and if damaged or heavily soiled
must be replaced
Caution - Thermal links are fragile
7Is the damper blade and case clean and free
from damage and corrosion?
Use a damp cloth, brush or vacuum cleaner to remove any dirt and debris.
If damaged or corroded dampers must be replaced
Caution - Blade sealing fabric is sharp, PPE should be used
8Does the damper close correctly? Pull the test handle on the external mechanism, the damper should close
9Does the damper open correctly? Rotate the setting handle 90° anti-clockwise until the underside of the handle
latches onto the thermal link
10 Do you have any concerns about the
installation?
Is there anything that does not look correct, do you have any doubts etc.?
11 Refit access door/s securely N/A N/A
Periodic maintenance procedure
If any of questions 1 - 9 is answered ‘no’, or if the answer to
question 10 is ‘yes’, please see troubleshooting overleaf.

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Symptom Possible causes Action
Damper closed and cannot be reset open Thermal link has activated Check thermal link by comparing with figures 1 and 2, page 3
If activated thermal links must be replaced
See below: 'Thermal link replacement'
Handle mechanism not engaged
on thermal link correctly Check machine screw in spindle cap is tightly screwed down
Test handle hard to pull Lack of lubrication
Remove handle mechanism, sparingly apply viscous lubricant to
region of spindle where handle slides, refit handle mechanism
See below: ‘Handle mechanism removal and replacement’
Damper blade not fully opening or closing Damper motion obstructed by
debris
Remove debris.
Ensure no damage has been caused to damper.
Handle mechanism fitted
incorrectly
Remove and refit mechanism correctly
See below: Handle mechanism removal and replacement
procedure'
Ensure no damage has been caused to damper
Damper seized Lubrication required
See below: 'Lubrication procedure'
Mechanical failure Contact HVC
Damper blade loose Mechanical failure Contact HVC
Installation guide: NCA Series 400 hand operated single blade leakage rated fire damper
Operation and maintenance manual
Page 2 of 3 - Issue A - 03/03/2022
Thermal link replacement
1. Remove handle mechanism as per steps 1 - 3 of ‘Handle
mechanism removal and replacement procedure’ adjacent.
2. Remove activated link (12mm spanner required) and discard.
3. Refit new link ensuring correct temperature rating is used,
68°C (red bulb in link) or 93°C (green bulb in link).
4. Refit handle mechanism as per step 4 of ‘Handle mechanism
removal and replacement procedure’ adjacent.
5. Open damper as per step 8 of the periodic maintenance
procedure.
Troubleshooting
Additional procedures
Handle mechanism removal and replacement
1. Ensure damper is closed (setting handle perpendicular with
damper case).
2. Referring to page 3, figure 3 if necessary, unscrew the
machine screw in the shaft end cap (pozi-drive screwdriver
required).
3. Slide spindle cap, compression spring, test handle and setting
handle off shaft.
4. To refit, reverse previous steps, ensuring setting handle is
replaced perpendicular to damper case.
Contact HVC if the above does not solve your problem.
Lubrication
1. Remove access door/s to access the inside of ductwork and
damper blade.
2. Clean damper if required following step 7 of the periodic
maintenance procedure.
3. Apply a small amount of light oil (WD40 spray grease
recommended) directly into the blade axle bushes.
4. Remove any excess oil with a cloth.
5. Conduct a cycle test as per steps 7 and 8 of the periodic
maintenance procedure and observe whether the operation
has improved.

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Figure 1
Thermal link non-activated state
Figures
Figure 2
Thermal link activated state
Figure 3
Handle assembly
Installation guide: NCA Series 400 hand operated single blade leakage rated fire damper
Operation and maintenance manual
Page 3 of 3 - Issue A - 03/03/2022